BL - Inseki

Aki lives with his playboy younger stepbrother Saku, who's with women more than he's at home. Aki, however, hate women and gets nauseous when dealing with them. One day, after Saku comes home late from playing with girls, Aki lets it slip he's kissed a man before. Saku, jealous, kisses Aki and it escalates into sex. When Aki tries to pretend nothing happen the next day, their relationship begins to change.

Masayuki is going to inherit his father's company, even though his older stepbrother Hajime is more capable. Because of this Masayuki's always compared Hajime causing Masayuki great stress. Masayuki's younger stepbrother Kei was his support when they were younger, but Kei left five years ago after assaulting Masayuki and became a celebrity. Kei suddenly returns to film a movie and brings with him more anxiety and conflict to Masayuki's life.

At school, Niina is known as the showy playboy, girls want to sleep with and Takizawa's the prince, girls want to marry, but the truth is Niina's a pure-hearted virgin who loves shoujo manga and Takizawa's a sadist. They're also hiding the fact they're stepbrothers living under the same roof. When Niina complains that girls don't see him as someone to fall in love with, Takizawa kisses him, telling him, "If it were me, I'd love you for who you are."

After his parents death when he was 6, Touma was adopted by his distant relatives and Tetsuo became his older brother. When Touma sees Tetsuo crying on the beach after breakuping with his married lover, he realizes his feelings for Tetsuo, but afraid of ruining his family, Touma hide his feelings. After Touma is unable to go on his class trip due to his severe separation anxiety, Tetsuo feelings change as well. But, the two continue to fight their feelings, so the can remain together.

Everyday Yukio is molested on the morning train by the same high school boy. But when Yukio's father introduces him to his male lover and his son, Yukio finds out that he'll be living with the molester, his new younger stepbrother Masumi.

Shuuto has loved his cousin and neighbor Chihiro, who often comes through Shuuto's window to sleep in his bed. One night, Shuuto begins masturbating to Chihiro's sleeping form, but when he kisses him, Shuuto's mother walks in. Having caused his mother to cry, Shuuto begins trying to deny his feelings. But, after hearing Chihiro having sex with a girl, Shuuto kisses him again while he's sleeping, but Chihiro wakes up. Realizing Shuuto's feelings, Chihiro starts looking at him differently.

Pg. 107-170: Takeharu's cousin Toshizou has returned after several years and he has become the kind of sloppy person Takeharu hates. However, Toshizou's presence allows Takeharu to make peace with his father's death.

Ch. 5: When he starts living with his cousin Ryou, Yuuya is forced to pay his living expenses with his body. However, Yuuya, who is in love with Ryou, is tired of felling like a prostitute and a housewife.

Pg. 174-199: Takahiro wants to get his 12 years older step-brother Hiroshi a Christmas present, but Hiroshi has always refused to tell Takahiro what he wants

Ch. 3: At 38, Naomi's mother Nahomi got remarried to 18 year old Tsukasa, but after 2 years Nahomi died and Tsukasa promised to raise Naomi. Now in high school, Naomi is in love with his step-father Tsukasa, but has decided to hide his feelings and live as his son