Soukyoku (MEGU Iroha)
Ikurou and Akaya are twin brothers who couldn't be more different as Ikurou excels in school and Akaya messes around. But in reality, Akaya is in love with his brother, and not all is as it seems. Ikurou urges Akaya to try harder in school and in return he'll grant him a wish, despite the fact that Ikurou's been terrified of Akaya ever since Akaya came onto him in middle school. But when Ikurou succeeds and demands sex in return, the relationship spirals out of control. Not my favorite, nor did it make the most sense to me. Trigger warnings: incest, rape.
Nanadome No Gomenne
Satoru loves his younger brother, Tooru, but Tooru has a stutter that has caused him to become a recluse. Even though Tooru sleeps with Satoru and seems to love him, when Satoru suggests they move out together, Tooru refuses. But when Satoru finds out it's because of their mother's abuse, he finally snaps. I'd say it's at interesting read, but upsetting and definitely not for everyone. Trigger warnings: incest, abuse, murder.
Antimoral Omegaverse