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Sekaiichi Hatsukoi  
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Onodera Ritsu quits his job and transfers to the publishing company Marukawa Shoten. Sadly, he gets assigned to the editing department that handles shoujo manga; and Ritsu, who vowed to never fall in love again, working on love stories is impossible. Panic ensues when he realises that the arrogant and tyrannical head editor turns out to be his former first love!

Includes Onodera's co-worker Kisa Shouta's storyline of his encounter with handsome student and book store clerk Yukina Kou.


Related Series

Associated Names
Лучшая в мире первая любовь
Самое прекрасное в мире - первая любовь
世界一初恋 ~小野寺律の場合~
Mejor Primer Amor del Mundo - El Caso de Onodera Ritsu (Spanish)
Melhor Primeiro Amor do Mundo - O Caso de Onodera Ritsu (Portuguese)
Sekai Ichi Hatsukoi - Onodera Ritsu no Baai
Sekai-ichi Hatsukoi
Sekai-ichi Hatsukoi - Yukina Kou no Baai
Sekaiichi Hatsukoi - Kisa Shouta no Baai
Sekaiichi Hatsukoi - Le cas de Ritsu Onodera
Sekaiichi Hatsukoi - Onodera Ritsu no Baai
Sekaiichi Hatsukoi Przypadek Ritsu Onodery
The World's Greatest First Love: The Case of Ritsu Onodera

Groups Scanlating
Dangerous Pleasure
It's Daletos!
Ninja Scanlations
Saku Translation

Latest Release(s)
v.9 c.27 by Saku Translation 4 months ago
v.9 c.26 by Saku Translation 5 months ago
c.25 by Ninja Scanlations 9 months ago
Search for all releases of this series

Status in Country of Origin
12 Volumes (Ongoing)

Completely Scanlated?

Anime Start/End Chapter
Starts at Vol 1, Chap 1 [S1]; Vol 3, Chap 5 [S2]
Ends at Vol 2, Chap 4 [S1]; Vol 6 Chap 10 [S2]

User Reviews

2 topics, 10 posts
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User Rating
Average: 8.7 / 10.0 (748 votes)
Bayesian Average: 8.61 / 10.0
 51% (379 votes)
 19% (140 votes)
 14% (101 votes)
 7% (49 votes)
 4% (28 votes)
 1% (8 votes)
 1% (4 votes)
 1% (5 votes)
 1% (4 votes)
 4% (30 votes)

Last Updated
January 9th 2018, 6:19pm PST



Category Recommendations





Original Publisher

Serialized In (magazine)
Asuka Ciel (Kadokawa Shoten)
Emerald (Kadokawa Shoten)

Licensed (in English)

English Publisher
SuBLime (9 Volume - Ongoing; Print)

Activity Stats (vs. other series)
Weekly Pos #510 increased(+35)
Monthly Pos #592 decreased(-57)
3 Month Pos #581 decreased(-122)
6 Month Pos #490 decreased(-123)

List Stats
On 2828 reading lists
On 482 wish lists
On 100 unfinished lists
On 576 custom lists

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Forum Posts
Second Season green-lit over 6 years ago
Sekai-ichi Hatsukoi Manga Has TV Anime in the Works over 6 years ago

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User Comments [ Order by time added ]

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Great Work!   
Rating: 10.0 / 10.0
by japcraze
June 23rd, 2013, 8:23pm
Though I really think Ritsu is a bit too stubborn, it just adds on the funny part of the story I guess. This is the first yaoi anime/manga that I have attempted and ever since then, I am so hooked to it!! One reason why I've become kinda a yaoi fan I guess =p DEFINITELY RECOMMEND THIS!!
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The best ♥   
Rating: 10.0 / 10.0
by Mochi__x
October 20th, 2012, 4:49am
I just love this ♥

To be honest I had my doubts at first, I'm not a big fan of Nakamura-sensei's art (I tried reading Junjou Romantica a few times but the art always put me off - though to be honest the characters did too) but Sekaiichi Hatsukoi's plot seemed fairly interesting so I gave it go. And I have to say her art has improved a lot since her older works, it's a lot cleaner and the characters' limbs seem to be more proportional now.

Yes, overall it is quite cliche; most of the ukes have the typical small stature & huge eyes (there's only 1 exception), the semes are possesive & pushy, and there are loads of silly misunderstandings (I'm mainly talking about the incident between Onodera & Takano in their student days - to be honest I think it should've been something a bit more convincing to warrant Onodera's reaction).

Although, that's all part of the reason why I adore this manga so much. I don't see anything wrong with stereotypical BL if it's entertaining, and my gosh this really is.

There's loads of comedy throughout, although it doesn't overshadow the romance at all. There are also some moments that can wrench your heart (the main one consists of Takano & Yokozawa having a certain discussion - I can almost guarantee that if you didn't like Yokozawa from the start, after that scene, you'll absolutely love the poor guy). Then to top it all of, there's also a lot of sex scenes (literally almost every chapter!).

I just adore stories that have multiple relationships (in fact the Warui Koto Shitai series is my second favourite manga of all time -- so if you haven't read that yet, then seriously go check it out: Ahh, Towa & Mikado are just so scrumptious! And there's the hot Shinonome too...) Anyway, I really like being able to read about different couples that are all in the same universe, and I love seeing how events in their relationships overlap. So I think that's one of the major reasons why I enjoy this manga so much.
Plus I like almost all the characters, so obviously that helps. The only ones I don't particularly care for are Yoshino & Hatori. -- Not just because of the non-con in the associated novel, but I just find them boring. Hatori is quite dull & Yoshino is far too stupid to even be considered cute. Though I suppose if you like Misaki from JR then you may like him too.
Apart from them, the other 3 couples are really adorable ^__^
Spoiler (mouse over to view)
I am including Yokozawa & Kirishima too, even though they don't make many appearances in the manga so far, I still think they have a wonderful relationship.

I know some people dislike tsundere characters but I think they're cute, so I especially love Onodera. Yeah he can be frustrating at times since he's so hesitant, but to be fair I don't think it's that easy for someone to dive head-first into a homosexual relationship, especially if it's with your boss/first-love-who-accidentally-broke-your-heart!

I also really like the setting of this too, as it isn't just an office-based romance or high-school themed story. In fact, I think the manga editing aspect of this makes it really interesting. Unlike other manga with a similar setup, this actually focuses a lot on the editing & publishing industries, which makes this pretty special as it goes into so much detail. Plus what I really like is how Nakamura-sensei can make jokes about the industry and when she describes a process (for instance, submitting the storyboard) there are often little snippets along the lines of, "this is how mangaka are meant to behave, but bad mangaka do this instead", and she sort of jokes around like that. (I couldn't be bothered to find an actual quote, so I'm not sure if my example made any sense, but if you read it then you'll probably understand what I'm getting at).

Even though this review is meant to be of the manga itself, I just want to recommend the anime to anyone who hasn't seen it yet, as the seiyuu are all amazing! I'm always a bit skeptical about watching anime after reading the manga, as I tend to imagine what the characters sound like while I'm reading, then when I get around to watching the anime adaptation I usually end up disappointed. But with this, the seiyuu all fit their roles perfectly, and really become the characters. Plus they just have such lovely voices ♥

So while Sekaiichi Hatsukoi doesn't have the most gripping of plots, I still think it's wonderfully entertaining and always leaves me with a warm fuzzy feeling and goofy grin. So if you're like me and just want something with minimum drama (no ridiculously complicated love-dodecahedrons thankfully!!) and lots of smut, then give this a go ^__^

(I also strongly recommend that you read the Yokozawa Takafumi no Baai novels as well -- they are brilliant! Plus the movie adaptation of YTNB has been announced, so that is definitely not to be missed!♥)

... Last updated on October 6th, 2013, 12:40pm
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My third favorite yaoi.   
Rating: 10.0 / 10.0
by tohogirl5
October 22nd, 2013, 8:50pm
I can say a lot of things about why I love Sekaiichi Hatsukoi, but it'll take like 3 days. It's my favorite after Junjou Romantica and Koisuru Boukun...and thats says a lot.

But seriously Onodera have to tell Takano that he loves him too! How long will it take? How many more chapters or even volumes?
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Rating: 10.0 / 10.0
by Everclear-san
August 11th, 2010, 12:46pm
I personally thought it was better than junjou romantica. The art has gotten better and even the plot is fresh and amusing. In fact, once you start reading it, it'll bring back the old nostalgic memories of your disastrous first love which makes you hope all the more that they'll work their problems out. After reading the raws, I couldn't understand why ppl would call it lifeless and dull, since it made me all giddy inside upon reading their relationship develop. It's funny, witty and amazingly gorgeous. Totally not a waste of your time. Nakamura-sensei truly brings out the best of all her characters!
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I love her work   
Rating: N/A
by missery
June 11th, 2012, 12:29am
I love her art and I love her characters! I'm a sucker for first loves so this one really got to me. Every chapter I read I get more and more hooked. I love how ritsu acts so cute. This is definitely one of my favourites, I keep reading and watching it over and over ^^
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Dont like the other couples   
Rating: 9.0 / 10.0
by poisonousrose1517
March 19th, 2012, 10:12pm
I love the story of Onodera & Takano, but the other two stories is... Blah...

I mean the Kisa and Yukina story is an alright story, they have their moments and there's the insecurity that makes it a little interesting but i'm not really feeling it too much, but i will say that Yukina is definitley the best looking in the series and i think that it has potential to be better...

And as for Hatori and whatshisname, i dont like the story at all so far, like you know its not good when you cant even remember the uke's name, this story also has its moments but its by far the worst story, and i have no hope for it...

I say keep the main couple of course, keep Kisa/Yukina, get rid of Hatori/Whatshisname and add Yokozawa/Kirishima... If you havent read the Yokozawa/Kirishima novel you definitely should, its really good!
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Sekaiichi Hatsukoi   
Rating: N/A
by aiuso
December 28th, 2011, 5:32am
I read this series after I had seen it practically everywhere, and I will admit, Nakamura Shungiku's other popular series, Junjou Romantica, was my first.
This series is almost as good as Junjou, some even say better, but since Junjou Romantica was my first yaoi series, I can't say if one is better than the other. All I know is that I LOVE Sekaiichi Hatsukoi as a whole.
The main pairing, Takano and Onodera, are absolutely adorable. I love the concept of this pairing, as it's something rather unique that I hadn't encountered in a manga before. There relationship is just so amusing, and sometimes even complicated, and you feel warm and tingly just reading and watching their relationship grow with each chapter.
The other pairing, Hatori and Chiaki, are also equally adorable; but well, all the couples in this series are adorable.
I was intrigued by Hatori's character when he was first introduced, since he seemed rather quiet and mysterious. I suppose he is rather quiet and mysterious, but Chiaki, brings out a different light in him. His love for Chiaki, his childhood friend, is so sweet and pure, and the two balance each other out nicely, in my opinion.
The next pairing, Yukina and Kisa, was a bit awkward at first, but it was nice to see Kisa gradually open up to Yukina and give himself to him.

I would definitely give Sekaiichi Hatsukoi a chance if you haven't already, because it is just a wonderful series that you cannot pass up.

... Last updated on December 28th, 2011, 5:33am
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Good yaoi   
Rating: N/A
by niteangel
April 9th, 2011, 9:17pm
It has romantic moments and the characters are likable. Easy to read. But sometimes it gets unbelievable how far into rape territory some of the scenes get into and characters just shake it off as something that happens when you're falling in love saying "oh, we have a normal subordinate-boss relationship" when he clearly forced sex on the guy. WTF? Maybe that's just me. Or maybe it's just "welcome to yaoi" where normal rules don't apply.
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one word for sekaiichi hatsukoi: LOVE!!!!!!!   
Rating: 10.0 / 10.0
by yoykumi
January 13th, 2012, 7:44am
i really really enjoy this manga!!! i can't w8 for the upcoming volume,its so great,i can't stand a minute without think of it! before this,i'm kinda not yaoi fans,but after read sekaiichi and junjou romantica,then i became fanatic! sekaiichi & junjou romantica always have one incomment, they are all true love! love forever! happy endings! ahh! i enjoyed how can impossible love become possible wink
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You couldn't possibly expect it to NOT be good, of course   
Rating: 9.0 / 10.0
by kurosu_yuuki
February 3rd, 2011, 10:12pm
To me this whole manga's high point is Takano. I adore him. He's just really funny and actually a cute kind of seme, because even being tyrannical and devilish, he's truly the caring type~! He's just pushy enough to get Ritsu to respond, too, but actually respects his space more than I expected. He's so intense and has that passionate gaze that makes me go "kyaa" all the time. Takano is pathetically, pitifully huggable. I know he has all that "I'm confident" aura around him, but I don't buy it. You see, Takano's really complex and his expressions make it crystal clear to see he's actually in pain, though he doesn't say it. He's freaking hot too, but...Nakamura-sensei's just not good at making characters look differently, is she? He looks EXACTLY like Usami Akihiko from Junjou Romantica, but with black hair
Ritsu is adorable too, though not as "shiny" as Takano. I actually love hot-headed ukes.
My second favorite characters is actually Yokozawa. Sure, he pissed me off from the very beginning, since he just got more and more annoying. I thought of a billions solutions for him, from getting paired up with someone to ending up helping Ritsu out. Most of the volumes that are currently out, I hated him. Then chapters came when his point of view was explained. I immediately understood him. How wouldn't someone fall in love with a person who only keeps them close? All of what he does is justified by his feelings and I can relate a hell of a lot to him, so I love him now. More than that, I feel bad for him. So please, please, Nakamura-sensei, let him be happy T-T
Oh, and I'm happy that Isaka-san shows up at bits! I love him so much, hurrray!

Gotta say it, though, I do criticise one matter: the way their relationship was developed. It would have been better if Ritsu fell in love with Takano again first, and THEN found out who he was. The way it happened, we all just knew he loved him, but refused to accept so himself, and the story was just a drag-on from that...especially since it shows in the end of the chapter how long it will take for Ritsu to realize, which means we'll all be expecting it...
And at a certain point, it gets just like every relationship Nakamura-sensei's portraits: the uke won't stop pretending like he doesn't want to, even when he does.

I'm not saying it is bad. Sekaiichi Hatsukoi is actually a pretty good manga. Funny, cute, and sexy, gets my attention until the end of each volume and makes me crave more - and believe me, that's a tough thing.
The only reason I will note rate it 10 is because Nakamura-sensei ALWAYS uses the same formula and keeps being popular because of that. She makes all her manga very cute, soft headed, funny and with just enough sex to make you get into it. And then she gets away without having to think more about plot or making the story or even the feelings deeper. C'mon, I know they are a nice couple and everything, but their feelings aren't the slightest bit believable at first! Ritsu falls in love with Takano without even KNOWING him.
Anyways, it gets compensated for. The mere idea of this story is so heart-wrenching, I couldn't not be obsessed. A love that lasts for that long? It's too beautiful to even be put in words. It shows in every expression of Takano's how much he longed to see Ritsu again. Also, Takano's past is a little better developed than Ritsu's.
As this manga goes by, it gets more dramatic, so I'm enjoying it as Ritsu gets caught up in his feelings and can't seem to escape anymore ^-^
Oh, but beware! If you start reading this, you won't be able to stop and it always seems like the chapters given, no matter how much, aren't enough.

... Last updated on October 13th, 2011, 7:39pm
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