I want to read something no-stress. No suspense or horror or tragedy or anything that will mess with my blood pressure. The romance should be obviously present but not all-consuming. Does that make sense? Basically, no excess drama that will give me headaches (i.e. love triangles, incest, rape, the whole ohnohelikesmebuthedoesn'tsobsobsob thing... the usual suspects.)

And the characters... they should be simple. Uncomplicated. And by uncomplicated, I don't mean 2D. I mean, easy to like and to understand.

Please no yaoi/yuri/ecchi/smut blah blah blah. I suppose shounen-ai/shoujo-ai is okay, as long as it's light.

Preferably Shoujo/Josei, but whatever's fine as long as it fits the criteria.

Thanks much in advance.

Hm, Kingyo Sou? It has a bit of drama, but not something you would think "OMG, just talk and solve things already!" and they don't fight over small things. It's really sweet, but I don't know if totally fits what you're looking for.

I second Kingyo Sou! Beautiful story, imo.
Nineteen, Twenty-One is also a pretty peaceful story, although it concentrates more on character development with an undercurrent of romance. I highly recommend it!
Mademoiselle Butterfly might also be worth considering. The romance itself is fairly undramatic and fluffy, happy moments abound in this story.

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fiveblithebells.com

Instantly thought of Eensy-Weensy Monster. In case if you're worried, the "psychological" genre isn't dark or heavy at all.

Issho ni Neyou yo
Love So Life
Dear Mine
Tomodachi no Hanashi

Slower Romance:
Ikoku Meiro no Croisée
Kuragehime


Sweet romance, but maybe a little more 'drama'
Kore wa Koi no Hanashi
Sekine-kun no Koi

14-sai no Koi

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"I'll shut your mouth~~~~~ with mine~~~"

二息歩行

Shoujo/Josei:
14-sai no Koi (seconding!)
Seishun Kouryakuhon (OK, actually, anything by Akizuki Sorata works, but this one is my personal favorite from her)
Story of Someone We Know

Shounen/Seinen:
Bonnouji
Gekkan Shoujo Nozaki-kun
Horimiya (there is a sort of "love triangle" though, but there's really no drama)
Koganeiro
Otoyomegatari (though there are some dramatic moments, but I don't know if these will essentially cause one "stress," haha)
Watashi no Ookami-san (though I also really want to recommend its sequel Dear, but there is a bit of drama here and there with that, mostly at the beginning, but still)

Nesumi Chisato also usually has simple, sweet, and uncomplicated romances in a fantasy backdrop. They read almost like children's stories, really.

Baby Steps could also fit, though it's primarily a shounen sports manga. There's definitely not that much drama in the romance department, though, so it fits. (And it is a really good shounen sports manga, just fyi.)

If you're going to recommend Mizutani Fuka recommend her ALL THE WAY.
Game Over (Mizutani Fuka)

And if you haven't read it...
A bride's story

Light Shoujo-ai
Kase-san
Like a Cinderella
Strawberry shake

Mademoiselle Butterfly-The Romance is nice and sweet, but the actual plot is quite tragic (overly happy ending though)
Usagi Drop-This was amazing!! Only the second half of the series focuses on romance, but it just is amazing
Sakamichi no Apollon-Does have a love triangle, but I feel that it is more of a subplot, this one focuses more on character development

Komatta Toki ni wa Hoshi ni Kike!-This one is shounen ai, but it is amazing (admittedly, you have to bear with the first 3 volumes, but after that...OMG, awesome). It focuses more on character development and school life than anything

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My Blog: http://himexcherry.blogspot.com.au/

second
Bonnouji
14-sai no Koi
Usagi Drop my be a little too much
Horimiya


Hibi Chouchou is cute
Nijiiro Days (MIZUNO Minami) is refeshing
Dear Tear short but nice

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in need of romance?
uncommon, sad, sweet

Onnanoko wa Yoyuu!
Chotto Friday
art is a bit old but both mangas are very enjoyable!

Last Game for sure, the girl is really dense to romance but it isnt the kind of dense that makes you go "BDGIUDHFUFHGFUFU GET IT ALREADY" its really cute how the guy tries to let her know and you can see that they really love each other. (bit of a triangle but he basically gives in to the guy before it begins)

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"I don't know everything, I'm just really good at explaining the past, so it seems like I know everything"

Mekakushi no Kuni As far as I remember, there was minimal romance drama. It's a great story, too There is a love triangle, but at that point the two protagonists are together and there aren't any break-downs/wavering affections.

Hmm, i'm always looking for romance manga related and when i found this topic, i was like "woah, how lucky, lets get busy!!" and i must say i loved almost every manga that people linked here, thanks everyone and i decide to share abit too

Vahlia no Hanamuko i loved the story from this one, is from AKIZUKI Sorata the other mangas that this mangaka did are nice too =)