The series Junjou Romantica series actually contain 3 main stories within them, which are loosely interconnected, with different couples as the main characters.
Junjou Romantica:
Misaki, struggling to pass his college entrance exams, is in need of a tutor to help pump up his failing grades. Unfortunately, his only option is the cool and sexy Akihiko Usami. Usami happens to be a famous boys’ love novelist, which doesn’t exactly float Misaki’s boat, especially since his main characters are “Akihiko” and “Takahiro,” the name of Misaki’s older brother and Usami’s childhood friend. Understandably, Misaki is pretty disgusted by the thought of someone using his older brother as his personal fantasy-material, but then after some tender loving from Usami, Misaki is also pretty confused. He may even be developing feelings for the older man...And when Takahiro introduces them to his lovely (female) fiancée, so begins the bumpy relationship of this odd couple, filled with comedy and pure romance.
Junjou Egoist: Kamijou Hiroki is a broken man, consumed by unrequited love for his childhood friend, Usami Akihiko (the writer character in Junjou Romantica). Along comes Kusama Nowaki, whose name "Nowaki" means "typhoon", an orphan working his way through life since middle school. Like the typhoon he is named for, he whirls into Hiroki's life and heart, blowing all resistance away before him.
Junjou Terrorist: As fate would have it, Professor Miyagi Yoh (whom Hiroki is working with as assistant professor), and Takatsuki Shinobu, a high school student, cross paths. Miyagi, when in high school, loved (and still cannot forget) a female teacher who had a terminal illness, is now faced with Shinobu, who just says whatever is on his mind. The wheel of destiny is beginning to turn once again...
Has another short story called Junjou Minimum in vol. 4, which in turn has a separate volume of its own.
(B-U)
Pure Romance; Junjo Romantica It is also Known as: 純情ロマンチカ, Pure Romance, Junjou Egoist, Junjou Terrorist
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Top 10 Manga Like Pure Romance; Junjo Romantica (Junjou Romantica) [2024 List]
10. Meganegoshi no Sora wa...
1-3) Even though Azuma's "spectacle fetish" is infamous, guys are out of the question, and Sorachi is definitely way out of the question - he's too serious for him to even carry on a decent conversation with. One day, however, Azuma finds Sorachi asleep without his glasses, and can't help himself from kissing him! Glasses may be the thing that attracts Azuma to Sorachi... or is it? Prequel to Wild Darling.
4) Let's Fall in Love
Minami always seems to walk in on Sawai being confessed to! Sawai doesn't know how good he has it, being beloved by cute girls. But there's a reason Sawai turns them down...
5) Let's Meet at One O'Clock
Every day Detective Saegusa Noritaka has an unwilling lunch date in serious cafe worker Nanase Ikumi. But every time Saegusa tries to get closer Nanase pulls away.
6) Kirishima (Saegusa's assistant)'s younger neighbor Tetsuji is getting ready to go to college. Kirishima's always had a crush on the younger man, but has never been able to tell him. But before he leaves, Tetsuji suddenly kisses him!
(M-U)
Meganegoshi no Sora wa... has finished publishing and it has 6 Chapters. It is also Known as: 眼鏡越しの空は…, Let's Fall in Love, Let's Meet at One O'Clock, Aishiteiru to Seijitsu ni Me de Katare
9. Ikoku Irokoi Romantan
Japanese yakuza clan heir Ranmaru just got married on a lavish cruise ship, but things aren't as they seem. The marriage is just for the appearances, and he ends up getting drunk and spending the night not with his bride but with the sexy ship captain. When the two men meet again in Italy, it is the start of a spectacular love story.
A Foreign Love Affair has finished publishing and it has 7 Chapters. It is also Known as: 異国色恋浪漫譚, The Romantic Tale of a Foreign Love Affair, Sensual Strangers, Koi no Annainin, The Guide of Love
8. Kuroneko wa Shippo de Amaeru
"When we met, I fell in love with you..." The novelist Sakaguchi was troubled. When Sakaguchi took in a weak kitten, the high schooler Kazuya who comes to his house to visit the cat, suddenly confessed. He thought it was just childish nonsense but while usually being quiet, the Kazuya who confessed his love awkwardly while his ears became red, seemed cute to Sakaguchi. But... adult love also entails sex, right?
The love between the rough novelist and clumsy high schooler.
Included one-shot: Alcohol Love Call
Kuroneko wa Shippo de Amaeru has finished publishing and it has 6 Chapters. It is also Known as: 黒猫はしっぽで甘える, The Black Cat Presumes with a Tail, Alcohol Love Call
7. Kyuuso wa Cheese no Yume wo Miru
Kyouichi's indecisive character has led him to repeatedly commit the foolish mistake of adultery. One day, Imagase, a college classmate he hasn't seen since graduation, shows up as the private detective hired by his wife to investigate his infidelity. Imagase, however, proposes a deal. He won't tell Kyouichi's wife about his affairs, but, for compensation, he makes an unbelievable demand: "I want your body in exchange..."
The Cornered Mouse Dreams of Cheese has finished publishing and it has 6 Chapters. It is also Known as: 窮鼠はチーズの夢を見る, Kyuuso wa Chiizu no Yume wo Miru, The Cornered Mouse Dreams of Cheese
6. Baby★I Love You
After sensing Hirasaka's hidden rejection and anger, the younger brother Akio sets his sights on making the rejected coworker Akio's "bride." Just wait until Papa finds out!
Baby★I Love You has finished publishing and it has 5 Chapters. It is also Known as: ベイビィ★アイラブユー, Baby I Love You
5. Ore ni Koishite Dousunda
When his interior designer mom takes off to New York for a year, Toranosuke, dorky name none withstanding, gets sent to stay with his uncle. And it's just his luck that Ryouji's obnoxious, violent, and has the same sharp tongue as Tora's mom. Only it turns out that he's not really that bad, and maybe Tora's falling in love (with his uncle, of all people), and Ryouji has a heart of gold underneath the bellowing and violence. Except that Ryouji's pretty much the worst guy in the world to fall for: he enjoys sex more than eating, has a commitment problem, and has long since convinced himself that he's really, really straight.
Ore ni Koishite Dousunda has finished publishing and it has 4 Chapters. It is also Known as: 俺に恋してどうすんだ, Why Are You in Love with Me Anyway?
4. Yasashii Kankei
Naoya is a car salesman and when he goes to drop off the keys for a new client, he realizes that it's his childhood friend Tsukasa who he hasn't seen since junior high. After Naoya's co-worker sexually harasses him, he begins to live with Tsukasa, but will things be just like they were before?
(from B-U)
Tender Affairs has finished publishing and it has 13 Chapters. It is also Known as: 優しい関係, Tender Connection, Gentle Relations, Tender Affairs
3. Toiki yori mo Yasashii
Two years ago Masato fell in love with the gentle-handed Kazaoka (they spent a night together without telling each other their names). He searched for that man and found out that he's a writer and that he goes to a nearby café. Masato starts working there part-time, and Kazaoka starts coming to the café more regularly, but he does not seem to recognize Masato.
(from B-U)
Toiki yori mo Yasashii has finished publishing and it has 6 Chapters. It is also Known as: 吐息よりも優しい, Even More Gentle than a Breath
2. Empty Heart ~Itsuwari no Koi Dakara~
Jun's unspoken love for Ryuuta is a secret to everyone... except Ryuuta's little brother, Takumi, who would love to have Jun to himself. Now in high school, Takumi is student, Jun is teacher, and Ryuuta is moving on with his life. Takumi offers himself to Jun as a substitute for his brother, but will it be enough to fill their empty hearts?
Empty Heart: False Love is currently publishing and has 2 Chapters. It is also Known as: empty heart〜偽りの恋だから〜, Empty Heart ~Itsuwari no Koi Dakara~
1. Koisuru Boukun
Graduate student Souichi Tatsumi is demanding, violent, tyrannical... and a homophobe. So, it's unfortunate that his best assets are a beacon to the homosexual eye: his ass and crotch. Unfortunate, indeed--for both him and his underclassman -slash- lab assistant, Tetsuhiro Morinaga, who is hopelessly in love with those assets despite the threat to his own personal safety.
Morinaga longs to tell Tatsumi how he feels, not to mention other longings... but, given Tatsumi's personality, Morinaga has a better chance of winning the lottery.
The Tyrant Falls In Love has finished publishing and it has 64 Chapters. It is also Known as: 恋する暴君, Koisuru Boukun