I am aware of Toshiue no Hito , the woman should not look like a middle schooler, and I dont consider something like Venus capriccio and hotaru no hikari in this genre...Grand Sun is sweet enough to be mentioned though the girl is just one year older than the guy so it wont be included in this list but I am still not sure whether the guy is older or the girl is older.
I have seen Pita ten anime so I dont want to read the manga..
I have read the following...[UPDATED from the following comments and searching about]
Note:- Though I am trying to tag some warnings, its better to click on the links to check whether they have smut or not, in case you want to steer clear of that. I have marked the ones I recommend by '♥'
EDIT dated 04/05/2011 : Since the "Older female younger male" tag actually does find you a lot more mangas easily, from now on, I would rather add ones worth a read from my end...I need to have time to check out any recommendations before i add them...
---xxx
Some with 1 year gap or so:- Mostly in school
The Boy Next Door
Musunde Hiraite (MINASE Mayu) - havent checked it out - as per milky_way -a senpai with androphobia x freshman guy
Yasashii Watashi (This one is in College)
Watashi no Shounen Story 1(My Boy Possession -Watashi no Shounen) and its sequel Story 4 (Your Girl Possession - Anata no Shoujo)
Amai yokubou
secret housemate
The Prince's Cactus
Choco to Mint to
Osuteki darling
[m]Jun'ai Koza Kemono Shiyou[/m]
Boyfriend (SOURYO Fuyumi) ♥ ♥
Sweet Little Winter- oneshot in Shuu 7
Akuma de sourou
Peppermint- manhwa, primary school x High school (both look like middle schoolers)
Extra story - Okosama Brat from Saboten no Himitsu
Koiiro Daori -Story 4 of Migawari Hakushaku no Bouken
Miseinen Lovers: Apparently Elementary x Middle school - guy doesnt look "elementary school" at all so dont worry
Anedoki
Hachimitsu Shounen ♥/2
Really?!
Andalusia no Koibito - 3rd story
Seishun no Tamago chapter 4
Onee-chan Dorobou
heart no ou-sama story 4 and 5
Private Prince - unsure how far apart they are, in uni
Pii Natsu ga Ippai
Sora no Manimani - high school freshman and childhood friend sophomore
Good Ending - sophomore with a crush on his senpai
Kanojo to Natsu to Boku - 8-page one shot about a rendezvous of kouhai and senpai
Kiss dake ja Kaesanai
Salad Days
Vol 1 ch 1
Vol 2 ch 2
Vol 3 ch 4
Vol 5 ch 1 2
Vol 7 ch 1 2 3
Vol 11 ch 6
Vol 13 ch 5 & 9
Vol 14 ch 3 4 & 6
Vol 17 ch 10
Boys Be... 2nd Season
Vol 1 ch 8
Vol 2 ch 13 14
Vol 5 ch 37
Vol 6 ch 41
Vol 8 special ch
Vol 9 special ch
Vol 11 ch 80
Vol 13 special ch
Both in school or on different levels of schools
Please save my earth- ♥ ♥ ♥ ♥ Elementary
x High schoolHow to Become an Adult - series - tingbudong2011's summary - elementary x high school and progressing - 7 years age gap - no english releases - RAW availae
Bitou Lollipop
Spoiler (mouse over to view)
Married woman and high school kid and high school gal and
(complete raws availae - 7 volumes puished in French) ..Spoiler (mouse over to view)
middle school
kid- the latter is the canon sorta with a triangleDear Mine ♥ ♥ ♥ same combination as above
Kekkaishi - ♥ Middle school x High school - shounen with no romance just a possie pairing indicated- mainly one-sided
Misty boy ♥ ♥ High school x College
Suki Suki Darling Story 1 - Middle school x High school
Say Love High school x University/College
Kimi wa Boku no Mono - Junior High x Senior High
Yoru Made Matenai -same mangaka as above -Junior High x Senior High
Natural - RAW availae- they are in elementaryxHigh school when they meet and with just the raws- romance might be in High school x college I suppose (please correct me if I am wrong) -very slight indications in this almost no-romance manga
Himitsu Kichi Story 1 Elementary x High school
Mou Speed de Karera wa - summary- between a childish looking high school girl and an older looking middle school boy- 4 years age difference
Furi Kuri
Sparkle x Sparkle College x High school - (havent read it so cant quite comment)
Ane-Mone Seikaten - Baby faced high school x grade school
Miyasaka Kaho Kessakushuu story 1 & 2
King of the Lamp
Otokonoko wa Hachimitsu Story 1 and story 5- sequel
Boy & Cool -chp 1&2 at least- 17 years old (high school) and 12 years old (elementary?)- with all the clichés you can possiy imagine
Shisen no Saki ni (YAMAMOTO Mato) one shot, 12 yr old x 17 yr old I think. Very small but sweet
Teacher/Tutor/school doctor x student
Gokusen ♥ ♥ ( romance is not the main plot but not one-sided either in future)
Otokonoko wa Hachimitsu Story 3
Sensei wa Boku no Mono -Title story
Cross ♥
cm0 -TOHNO Kazumi
Midara Story 2
my lion and its sequel my darling lion
Unbalance x Unbalance ♥
Twins story
Ano Ko to Boku no Ie Story 2/chapter 2
Please teacher ♥
B.Reaction! ♥
Beautiful Fascination is Better than Love
Sonoki ni Sasenaide (FUJIWARA Akira) and sequel (RAW availae)
Koi-Moyou story 3
Akahime Ranshin
Honey
VS Versus ♥
Isshou Asonde Kurashitai
Sekai wa Bokura no Tameni! ♥ (smut)
Naisho x Boy(Chinese RAW availae)- baby faced small female
Namida no Kajitsu - same mangaka as above (didnt find RAWs also)
Houkago Host Club Story 1/Title story
Teacher's pet ♥ warning: mature
Gomen Nasai [Ninomiya Hikaru] Oneshot [RAW]- Title not included in MU
Sensei wa Ore no Mono-teacher is a baby faced sweet nurse
Shounen Nure Yasuku Koinarigatashi -RAW availae- not translated
Spoiler (mouse over to view)
Dark and treated like a crime that it actually is..
Rouge Noir
Choukyouai - story 3 Midsummer Temptation
Voices of Love -not tried from description only- Title story probay
Flowers (NIHONBASHI Yoko) ♥
First Love Kiss - one story about a teacher and her student
Dengeki Love Machine - story four about high school senior and university tutor
Saikyou no H story 2 - cinderella in love: teacherxstudent relationship
Udon no Onna College student x 35 yr old Kitchen cook
Wolf Guy - Ookami no Monshou - a very sadistic story with loads of violence and
Spoiler (mouse over to view)
disgusting rape
so be aware.Others unclassified
Mani Mani - Story 1 (mature) and apparently Chapter 6 - sequel
Natsu e no Tobira - one shot- 14 year old x courtesan- complicated dramatic story line
Cool Lady - havent checked it out
Himitsu Chapter 1 - havent checked it out
Hyakunen Renbo - havent checked it out - as per milky_way- much older witch x younger prince
A million-pound love - Story 1 - 60 years
Fujoshi Kanojo - the focus of the manga is in the name
Talking About... can't say I like this though its like a watching a dorama
Natsu no Zenjitsu ♥ Really nice and slow without being presumptuous-somewhat rustic and has a bit of a sad atmosphere..
Suppli or Sapuri -♥ workplace romance though only one manga chapter has been released, the drama is pretty famous and the actors themselves have a 9 year difference
- an adult romance so a recommendae one..Maison Ikkoku -Long manga, good read if you like Rumiko Takahashi. dragging a bit yes but enjoyae old style manga
Happiness forms chapter 4-5 of the mangaCherish - Office colleagues, single mom x younger male
Tadashii Renai no Susume - Teenage gigolo x older woman
Love Scar - same mangaka as above
Benten-sama ni wa iwanaide (only RAWs availae) same mangaka as ===
Candy Life - ♥ sort of slapstick for the mangaka but enjoyae nonetheless
Coming home
ES ♥ ♥ ♥ ♥
Flower Garden (TOHNO Kazumi) -♥ crappy crappy art and some cliches
Spoiler (mouse over to view)
(how can you accidentally sleep with a teenager? )
but enjoyaekimi wa petto- really good manga but would have ♥ ed if
Spoiler (mouse over to view)
it didn't have an ambiguous ending
Fukigen na aibu
Playground love
Running Through The City In The Sunset
Itadakimasu ♥ ♥ ♥
Provence ♥ ♥ ♥
Koi wa Misoji wo Sugite kara warning: mature
Okusama wa Mahou Shoujo - whole anime series subbed and released, didnt find any RAWs
Yunohana Tsubame ♥ sketchy art but enjoyae unsurprising storyline
G-Senjo no Maria extra story - Younger male's unrequited love
Slip - RAW availaAs the topic describes, can be really sweet like Dear Mine or even mature like Teacher's pet.
I am aware of Toshiue no Hito , the woman should not look like a middle schooler, and I dont consider something like Venus capriccio and hotaru no hikari in this genre...Grand Sun is sweet enough to be mentioned though the girl is just one year older than the guy so it wont be included in this list but I am still not sure whether the guy is older or the girl is older.
I have seen Pita ten anime so I dont want to read the manga..
I have read the following...[UPDATED from the following comments and searching about]
Note:- Though I am trying to tag some warnings, its better to click on the links to check whether they have smut or not, in case you want to steer clear of that. I have marked the ones I recommend by '♥'
EDIT dated 04/05/2011 : Since the "Older female younger male" tag actually does find you a lot more mangas easily, from now on, I would rather add ones worth a read from my end...I need to have time to check out any recommendations before i add them...
---xxx
Some with 1 year gap or so:- Mostly in school
The Boy Next Door
Musunde Hiraite (MINASE Mayu) - havent checked it out - as per milky_way -a senpai with androphobia x freshman guy
Yasashii Watashi (This one is in College)
Watashi no Shounen Story 1(My Boy Possession -Watashi no Shounen) and its sequel Story 4 (Your Girl Possession - Anata no Shoujo)
Amai yokubou
secret housemate
The Prince's Cactus
Choco to Mint to
Osuteki darling
[m]Jun'ai Koza Kemono Shiyou[/m]
Boyfriend (SOURYO Fuyumi) ♥ ♥
Sweet Little Winter- oneshot in Shuu 7
Akuma de sourou
Peppermint- manhwa, primary school x High school (both look like middle schoolers)
Extra story - Okosama Brat from Saboten no Himitsu
Koiiro Daori -Story 4 of Migawari Hakushaku no Bouken
Miseinen Lovers: Apparently Elementary x Middle school - guy doesnt look "elementary school" at all so dont worry
Anedoki
Hachimitsu Shounen ♥/2
Really?!
Andalusia no Koibito - 3rd story
Seishun no Tamago chapter 4
Onee-chan Dorobou
heart no ou-sama story 4 and 5
Private Prince - unsure how far apart they are, in uni
Pii Natsu ga Ippai
Sora no Manimani - high school freshman and childhood friend sophomore
Good Ending - sophomore with a crush on his senpai
Kanojo to Natsu to Boku - 8-page one shot about a rendezvous of kouhai and senpai
Kiss dake ja Kaesanai
Salad Days
Vol 1 ch 1
Vol 2 ch 2
Vol 3 ch 4
Vol 5 ch 1 2
Vol 7 ch 1 2 3
Vol 11 ch 6
Vol 13 ch 5 & 9
Vol 14 ch 3 4 & 6
Vol 17 ch 10
Boys Be... 2nd Season
Vol 1 ch 8
Vol 2 ch 13 14
Vol 5 ch 37
Vol 6 ch 41
Vol 8 special ch
Vol 9 special ch
Vol 11 ch 80
Vol 13 special ch
Both in school or on different levels of schools
Please save my earth- ♥ ♥ ♥ ♥ Elementary
x High schoolHow to Become an Adult - series - tingbudong2011's summary - elementary x high school and progressing - 7 years age gap - no english releases - RAW available
Bitou Lollipop
Spoiler (mouse over to view)
Married woman and high school kid and high school gal and
(complete raws available - 7 volumes published in French) ..Spoiler (mouse over to view)
middle school
kid- the latter is the canon sorta with a triangleDear Mine ♥ ♥ ♥ same combination as above
Kekkaishi - ♥ Middle school x High school - shounen with no romance just a possible pairing indicated- mainly one-sided
Misty boy ♥ ♥ High school x College
Suki Suki Darling Story 1 - Middle school x High school
Say Love High school x University/College
Kimi wa Boku no Mono - Junior High x Senior High
Yoru Made Matenai -same mangaka as above -Junior High x Senior High
Natural - RAW available- they are in elementaryxHigh school when they meet and with just the raws- romance might be in High school x college I suppose (please correct me if I am wrong) -very slight indications in this almost no-romance manga
Himitsu Kichi Story 1 Elementary x High school
Mou Speed de Karera wa - summary- between a childish looking high school girl and an older looking middle school boy- 4 years age difference
Furi Kuri
Sparkle x Sparkle College x High school - (havent read it so cant quite comment)
Ane-Mone Seikaten - Baby faced high school x grade school
Miyasaka Kaho Kessakushuu story 1 & 2
King of the Lamp
Otokonoko wa Hachimitsu Story 1 and story 5- sequel
Boy & Cool -chp 1&2 at least- 17 years old (high school) and 12 years old (elementary?)- with all the clichés you can possibly imagine
Shisen no Saki ni (YAMAMOTO Mato) one shot, 12 yr old x 17 yr old I think. Very small but sweet
Teacher/Tutor/school doctor x student
Gokusen ♥ ♥ ( romance is not the main plot but not one-sided either in future)
Otokonoko wa Hachimitsu Story 3
Sensei wa Boku no Mono -Title story
Cross ♥
cm0 -TOHNO Kazumi
Midara Story 2
my lion and its sequel my darling lion
Unbalance x Unbalance ♥
Twins story
Ano Ko to Boku no Ie Story 2/chapter 2
Please teacher ♥
B.Reaction! ♥
Beautiful Fascination is Better than Love
Sonoki ni Sasenaide (FUJIWARA Akira) and sequel (RAW available)
Koi-Moyou story 3
Akahime Ranshin
Honey
VS Versus ♥
Isshou Asonde Kurashitai
Sekai wa Bokura no Tameni! ♥ (smut)
Naisho x Boy(Chinese RAW available)- baby faced small female
Namida no Kajitsu - same mangaka as above (didnt find RAWs also)
Houkago Host Club Story 1/Title story
Teacher's pet ♥ warning: mature
Gomen Nasai [Ninomiya Hikaru] Oneshot [RAW]- Title not included in MU
Sensei wa Ore no Mono-teacher is a baby faced sweet nurse
Shounen Nure Yasuku Koinarigatashi -RAW available- not translated
Spoiler (mouse over to view)
Dark and treated like a crime that it actually is..
Rouge Noir
Choukyouai - story 3 Midsummer Temptation
Voices of Love -not tried from description only- Title story probably
Flowers (NIHONBASHI Yoko) ♥
First Love Kiss - one story about a teacher and her student
Dengeki Love Machine - story four about high school senior and university tutor
Saikyou no H story 2 - cinderella in love: teacherxstudent relationship
Udon no Onna College student x 35 yr old Kitchen cook
Wolf Guy - Ookami no Monshou - a very sadistic story with loads of violence and
Spoiler (mouse over to view)
disgusting rape
so be aware.Others unclassified
Mani Mani - Story 1 (mature) and apparently Chapter 6 - sequel
Natsu e no Tobira - one shot- 14 year old x courtesan- complicated dramatic story line
Cool Lady - havent checked it out
Himitsu Chapter 1 - havent checked it out
Hyakunen Renbo - havent checked it out - as per milky_way- much older witch x younger prince
A million-pound love - Story 1 - 60 years
Fujoshi Kanojo - the focus of the manga is in the name
Talking About... can't say I like this though its like a watching a dorama
Natsu no Zenjitsu ♥ Really nice and slow without being presumptuous-somewhat rustic and has a bit of a sad atmosphere..
Suppli or Sapuri -♥ workplace romance though only one manga chapter has been released, the drama is pretty famous and the actors themselves have a 9 year difference
- an adult romance so a recommendable one..Maison Ikkoku -Long manga, good read if you like Rumiko Takahashi. dragging a bit yes but enjoyable old style manga
Happiness forms chapter 4-5 of the mangaCherish - Office colleagues, single mom x younger male
Tadashii Renai no Susume - Teenage gigolo x older woman
Love Scar - same mangaka as above
Benten-sama ni wa iwanaide (only RAWs available) same mangaka as ===
Candy Life - ♥ sort of slapstick for the mangaka but enjoyable nonetheless
Coming home
ES ♥ ♥ ♥ ♥
Flower Garden (TOHNO Kazumi) -♥ crappy crappy art and some cliches
Spoiler (mouse over to view)
(how can you accidentally sleep with a teenager? )
but enjoyablekimi wa petto- really good manga but would have ♥ ed if
Spoiler (mouse over to view)
it didn't have an ambiguous ending
Fukigen na aibu
Playground love
Running Through The City In The Sunset
Itadakimasu ♥ ♥ ♥
Provence ♥ ♥ ♥
Koi wa Misoji wo Sugite kara warning: mature
Okusama wa Mahou Shoujo - whole anime series subbed and released, didnt find any RAWs
Yunohana Tsubame ♥ sketchy art but enjoyable unsurprising storyline
G-Senjo no Maria extra story - Younger male's unrequited love
Slip - RAW available
Line (NISHIMURA Shinobu) - RAW- same mangaka as above, guessin that this is also same type
[m]Marine[/m]- So far, only found Summary. Doesnt fit the topic so much and is a tragedy and very slightly resembles movie Birth in the
Spoiler (mouse over to view)
time discrepancy between the couple
Otoyomegatari ♥ ♥ ♥ ♥
Merupuri -
Spoiler (mouse over to view)
Its a boy who occassionally changes into an adult, ideally a boy in a man's body
My Fair Gentleman - not so obvious,mentioned once or twice
Unworthy son -
Spoiler (mouse over to view)
Unrequited feelings for step mom
Oboretai Volume 1 story 3
Sheet no Sukima chapter 3
Kuroneko Guardian - we never do get to know the girl's age, almost a BL to me
[m]Watashi no Suki no Hito[/m] - not sampled-one short story about a seven year discrepancy
Queens - assistant in love with the mangaka he's working for
Furachi na Otokotachi - story one (junior at work) and five (ex-junior from school)
Koi wa Misoji wo Sugite kara - office lady and her junior
Usagi Drop - both in their thirties, the woman is two years older, I think, not much romance yet
Good-bye, My 19 year Old Self
Spoiler (mouse over to view)
younger brother loves older brother's girlfriend, sad ending
Enchanter
Offered
Furachi na Otokotachi story 1
[m]Kanojo wa Kanno Shosetsuka[/m]
The Legend of Maian
mizutama puzzle 24 yr old x 32 yr old.there is a mature tone to this...so far two chapters and good.
Himawari (UENO Ai) -
Spoiler (mouse over to view)
Guy who loves the girlfriend of his older brother- good ending
♥bride (aivan) - one shot. Historical and very short. Interesting premise.
Nounai poison berry
Game Over (MIZUTANI Fuka) - Main story- OL(office lady) x Middle schooler- around 10 years gap probably..
Spoiler (mouse over to view)
they get married eventually
Natsuyuki Rendezvous Its an Anime as well! 8 years gap.
Spoiler (mouse over to view)
focuses more on the dead husband than the younger guy
- sad story in a wayMachi de Uwasa no Tengu no Ko extra with chapter 7. Step siblings who are non blood related. 8 yrs diff. Boy in school.
Mature/Smut-Not much story
Before Dawn warning: almost hentai
Taiken Story 1- Middle school x High school- no brainer, just smut
Naughty Honey University Student x High school student -another smut ;_; superfast progression to the 3 words n beyond in just 30 odd pages
Romantic Beauty - second story
Sensei, Mou Ichido... story 3- blanket, Ichimai no Yoru warning: smut. 22 x 27 yr old
Off-Time no Kemono story 3, 2 years gap. Warning: smutty. Male is a carry over character from story 2. Woman looks meek but has some substance. You do feel - awww, at the end so good to read
Side Couples or non main characters or a phase
...Seishunchuu! ♥ One of the side couples -teacher x High school boy
H20 - One of the side couples is a persistent school nurse pursuing school president.
Love Survival
Talking About... - assistant and the mangaka he's working for
D-ASH
14-sai no koi -side couple, 14 yr old x 24 yr old teacher
Story of Someone We Know side couple! many characters. 2 yrs age gap
kanpeki kareshi kanojo chp4 n chp 5, 16 yr old high schooler x 20/21 yr old university student
Harem - not sampled
Yoru Cafe
Nyan Koi!
Spoiler (mouse over to view)
in the words of -sippisappi .."There's one girl a few years older than the main character, unfortunately no main character and they did not actually have romantic feelings towards each other or distinctly romantic situations and I'm afraid they won't end up together, but still wanted to note"
KissxSis can be added to the below category
Incest
Tsumi ni Nureta Futari Warning: mature
Seishun Pop! +harem
Ane Komi
Totinona
...however, like I said I dont want ones like Venus Capriccio because this happens is everyday life, 
