Forbidden Love Yaoi

Stepbrothers
Asuka and his younger stebrother Yui were best friends until they got stuck in a locker in an abandoned building years ago, and ever since Yui is arrogant and cold. But what really happened that day?

Stepbrothers
Akito's stepbrother Iku got distant in middle school, around the time when he grew a lot (in every aspect). Jealous of Iku's dick size, Akito tries an enlargement cream that turns him on, and Iku comes to help him out.
Trigger warnings: incest themes(stepbrothers), dubcon.

Stepbrothers
Diligent older brother and rebellious younger brother. Now that it's time to go to college, older brother decides to break the rules.

Stepbrothers
Childhood friends/neighbors and owners of a flower and a liquor shop become stepbrothers.

Stepbrothers
Older bro acts like a delinquent to relieve stress from secretly being in love with his younger brother.

Stepbrothers
Beloved stepbrother who dreamed of being a cop went off to college and came back a year later as a dropout with a tattoo on his back, and now he's being cold, despite the fact he kissed his brother a year ago before leaving.

Stepbrothers
Little brother is a popular cross-dressing model, older brother tries to push him away by calling him disgusting.

Stepbrothers
Aoi has raised his little brother Haruto for the last 10 years and even teaches at Haruto's school, but when Haruto confesses on his 18th birthday, Aoi realizes things have to change. Surprisingly sweet, healthy relationship.
Trigger warning: incest themes (stepbrothers).

Stepbrothers, threesome
Towa wants nothing more than to keep his beloved family together with his two stepbrothers, who he thought had straightened out their rebellious ways, but when he finds them one night with a woman in each arm, he realizes his peaceful life is a sham.

Stepbrothers, threesome (twins)
Yuki finds out his twin older brothers aren't related to him and can't get hard, so of course they decide to take a bath together, and things escalate.