Gaten Na Aitsu
1-3) Gaten na Aitsu The son of the owner of a construction firm is harassed by his seniors in school. His father's live-in worker happens to pass by while he was being assaulted... Story continues in act 4 found in volume 1 of Play Boy Blues (chapter 5). 4) P.B.B. Shinobu and Junsuke are still living together even though Shinobu quit being a host. Something starts to change between their relationship... (this is the first act of Play Boy Blues).
Brother (Ougi Yuzuha)
While playing in an abandoned warehouse, step-brothers Asuka and Yui get trapped inside an old locker. What happens inside changes their relationship forever. Yui suddenly starts avoiding his older brother, even going so far as heading to America to study away from him. Years later, after Asuka has begun working in an advertising agency and Yui is still playing tennis in high school, the brothers are reunited and the truth about that summer is revealed. http://mangapark.me/manga/brother
Bokura Wo Shihaisuru Kotoba
Sora and Tatsuki are step-brothers whose parents died in an accident. Since then Sora has taken care of the younger brother, Tatsuki. Now Sora is a very popular mystery writer. Tatsuki is an editor of a women's magazine. Tatsuki feels guilty because he can't stop himself from loving Sora and decides to move out. However, Sora can't stand being alone and spends all his time at Tatsuki's. One day, Sora agrees to write for the women's magazine if Tatsuki can be his editor.
Koi Nanka Shitakunai
When Nakajima's mother decided to remarry he was afraid but everything turned out to be even better than he expected. His new older brother helps him and spoils him a lot and they're getting along very well until the moment when Nakajima comes home earlier and sees his big bro playing with another guy in the bedroom. What's gonna happen from now on? Spin-off: Koi Ni Nare!
3-pun Instant no Chinmoku
Toujou Aki lives with his younger step-brother, Saku who is a university student. Instead of going home to sleep though, Saku will stay out with as many women as possible, to the point of being a man-whore. Aki, on the other hand, has a deep hatred for women, enough to make him nauseous being around them. Aki's one secret is that he would do anything for his brother. No matter what it is. However, everything can change in an instant during the silence of three minutes.
Momoiro Shoukougun
1-2 - Classmates Hikari and Hyuuga become brothers after their parents get married. 3 - A business man worries about being liked by everyone but can't help being mean to this one guy at work 4 - A love story between a japanese snack shop and a pastry shop 5 - A man's neighbour turns out to be his senpai who disappeared from his life years ago 6 - A librarian reunites with his athletic friend from school 7 - A teacher living with his former student worries about their relationship
Kokoro O Korosu Houhou
Haruki is a lawyer who works in a law firm. His father remarries at the age over 50, and now he has a step brother who is 10 years younger than him. All Haruki wants is to protect him because they are brothers. But Hikaru his younger step sibling, never thought of him as his brother.
Netsuai (NAONO Bohra)
Ch 1-2 The son of a distinguished family, Kazuki has always been treated differently, even though he considers himself a good-for-nothing son. But five years ago when his father remarried, Kazuki got a new older brother. Souya was very talented and kind, which eventually led Kazuki to leave home to escape his feelings. But one day Souya comes looking for him.
Yukimura-sensei To Kei-kun