Yankee-kun To Pantsu No Ouji-sama
Tsundere delinquent Kachidoki is secretly dating the school's "prince", closet-pervert Suou. Kachidoki is ostracized by his peers for being different, and Suou decides to protect him. Suou moves abroad for college, promising to marry Yamato when he returns. Attempted rape from Suou's brother
ROUGE (KATSURA Komachi)
1-4 + 6.1-7.2. Nagato is a delinquent who transfers to an all-boys school, and meets Ai, the "pet" of the seniors yakuza-bred group. Ai slowly comes to love Nagato and his sincerity, and lets down the trauma-hardened walls that he's built around himself. 5-6. Haruna has a one night stand with a priest, Ryu, and they decide actually date after a fight
Love Me Or I'll Kick Your Ass!!!
Shouta is a rich born college student, who longs to be a delinquent like his hero, Soushi. However, Soushi has grown up, and lives a normal life. Shouta wants to remind him of the old days... with sex
Caramel Honey
Ayato ("Bun-chan") is a nerdy boy who attracts violence easily. He transfers to a school full of delinquents, where Horiguchi, the top dog, has fallen in love with him. [Extra couple: Horiguchi's brother, Masato, and Fumisawa, his bullying victim, fall in love (and are still together in their 30s)
Danshi Koukouseiteki Kazoku Keikaku!
Hino is a misunderstood "delinquent", who takes care of his nephew, Satoru, like a son. Reona is a boy from the cooking club who makes delicious sweets, and Hino wants him in the family, to make pudding for Satoru. Reona decides to marry Hino instead
Asahi, the Cheeky Crossdresser
Yugo bumps into a former classmate, Asahi Miura, who now crossdresses as a model, "Miu." Yugo realizes that Asahi is the only person hes ever loved, and they navigate their relationship together. [So SO cute, brings up consent multiple times, sex is all consentual. Bonus points for Demisexual guy rep!!]
Kanjou Spectrum - Yoneda Kou
Kugou offers to help Usui, a boy in his class, get together with his best friend Nakaya. Along the way, he realizes hes fallen for Usui. Luckily for him, Usui had lied about liking Nakaya. He had always really liked Kugou.
You're My Princess
Itsumi is regarded as a delinquent for his looks, despite being soft and awkward. Seima is the School Prince, who is in love with him. When they start dating, Itsumi realizes that he likes being Seima's "princess"
Aka To Kuro (katsura Komachi)
[Prequel to Rouge] Yukio and Yamato are both children of yakuza families, Yamato being the young leader of the Bidou clan. Yukio is his loyal follower and friend, even in high school. Through Yakuza politics, they realize their deep love for each other.
Kouzuka Kottouya no Akujiki