
This one has a lot of potential. I already have two theories.
1) He was a victim of the serial killer and it traumatised him, maybe he was raped by them and now he has like this urge of have sex when those memories of that trauma were brought up.
2) He's the serial killer. Maybe he has like a double personality disorder. Or maybe a friend of him was and because of his disorder he (the friend) made him think he was the serial killer, which can also be connected to theory one. Everyone would be traumatised if their friend raped them. And maybe when he saw the body he thought he (uke) was doing it again (friend made him believe he's the killer) but he couldn't remember because of his disorder
REMEMBER, I CALLED IT

Im pretty into BDSM so yeah, I'm gonna continue reading it. There's the whole thing about the consent but at least seme kept saying that he wouldn't do anything he didn't want and he seems genuinely in love with the uke so I guess it's pretty cute

Yup. I absolutely think this is a refreshing yaoi, I just hate anyone painting this as consensual or 'real' BDSM. It's not.
Yesyesyes. Though looking characters are usually the sweetes. And senpai is the cute but decisive kind of uke, I love him so much already
Whaaaa really? I really wanted him as use though well whatever, I bet it will still be hot af