Shite Hoshii Koto, Oshiete Ageru.
Ren's a high school student in love with his best friend, but after waking up with his sister's boyfriend mistakenly entering his bed, he finds himself interacting more with Kazuya, who offers to "help him out" by touching him. As their relationship progresses, Kazuya moves from playing with Ren to feeling guilty for what he's done to him as he realizes he's causing Ren to relive his own trauma. This story is interesting, and I enjoyed it, but at the end of the day, there's no defending Kazuya as a male lead. Trigger warnings: noncon, cheating, rape, statutory rape.
Dattara Ore ni Horeteshimae
Substitute in an arranged marriage to a rapist asshole
Gokudou no Oshi Men
Azusa is the young boss of a yakuza clan who secretly stans the idol, Alto. One day he meets Alto at a bar and finds out that his cutesy persona is all a cover, and the real Alto is much more selfish, brash, and mouthy, but he's delighted nonetheless. Then Alto takes him to a hotel and practically rapes him, but tells him his real name is Kouichiro. After that, they become sex friends, then more, though things take a turn when Azusa's older brother returns from studying with the Italian mafia. Honestly, Azusa is very cute but the actual events of this story are whack. Trigger warnings: rape, lying/manipulation.
Syuuchaku Alpha no Chioukyou Method
Asahi and Kei were inseperable childhood friends, until Asahi was unexpectedly diagnosed as an omega with a special constitution that would only react to his fated pair and Kei went off and raped him. After that, Kei completely distanced himself from Asahi before Asahi could even ask why. But when they meet again at a class reunion, Asahi goes into heat for the first time and Asahi takes him to a hotel, starting a very unhealthy relationship that Asahi fears to end. Trigger warning: rape.
Taka ga Fukuen
Ch.1-3, 6 - Takehara is a working man at a mall who finds that one of his new coworkers, Amano, was his high school boyfriend who went too far with him physically before he was comfortable, and the two drifted apart. Now, Takehara wants to fix things with Amano, while Amano wants to put the past behind them. Trigger warning: noncon. Ch.4-5 - Chigira is a former athlete who quit after being raped, and he thinks his rapist is now his stalker. After a crazy one night stand with a stranger, he learns the stranger is a cop trying to catch the man who raped him, who has since moved on to others. And the rapist may be closer than he thinks. This story was weird and depressing, not for me. Trigger warnings: rape, stalking, drunk sex.
Tsukiyo no Midare Zake