Forbidden Love Yaoi

Stepbrothers, threesome (twins)
Eunsoo's mom is remarrying and his new twin stepbrothers couldn't be more thrilled, since it gets them closer to Eunsoo.

Adopted brothers, twins
Tenya and Yamato were raised as twins, but when they find out they're not related, Yamato starts acting like a delinquent. Tenya takes it on himself to help Yamato back to the right path, but he's in for more than he bargained for.

Adopted brothers
Working in the orphanage where they grew up, Misaki is a priest and Kou manages things, but when Kou's father shows up, will this change things between them?
Trigger warning: forced confinement.

Adopted brothers
Adopted bros are roommates in college.

Half-brothers
These brothers live together, but when their mom moved out, the older brother suddenly became distant.

Half-brothers
Amnesiac thinks he is his younger half brother's wife. Also this one has supernatural elements and is borderline a horror manga, except it ends happy, so that's fun.

Biological brothers
Yutaka gets a letter from his beloved older brother who comes back to town. This one is shounen ai, and they don't end up together.

Biological brothers
Yuzuki's a professor with a longtime unrequited love for his younger brother, Takayuki. University student Kazusa finds out and blackmails him into a relationship, but this actually spurs Takayuki to confess to his brother. But Yuzuki rejects his brother for his sake, causing Kazusa to question what he's been doing. Brothers don't end up together.
Trigger warnings: rape, blackmail, statutory rape.

Biological brother/guardian
Gullible older brother with amnesia and his reliable younger brother and guardian deal with complicated feelings and trauma from the accident that caused older bro's amnesia a few years back.

Biological brothers
Haruto worked to take care of his family until he burned himself out and now he lives by begging a woman for money. When his brother Asahi finds him, he forced Haruto to come back to his house and won't let him leave, and we learn of Haruto's past struggles and Asahi's twisted love. I would have liked this one better if Asahi wasn't so yandere.
Trigger warnings: yandere, incest themes(brothers), forced confinement, manipulation, dubcon.