
A bit of spoiler
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From the raw that I've read so far, it doesn't look like something really bad happend to the kidnapper. It just looks like the prisoner was bit of a dick to him with the knowledge of his feelings. Idk what will happend in the future, but the biggest problem seems to be the mentalyty of the kidnapper. He does not look psychically normal in the flashbacks.

read this and you'll shock. There are 2 people attacking the kidnapper but idk what actually happend
https://webtoon.bamtoki.com/%EA%B0%90%EA%B8%88%EC%B0%BD%EA%B3%A0-34.html

Warning. Answer to the spoiler ahead..........
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If he is just insane I find it even more intriguing! In the majority of manga there is a rational reason behind everything.

thank you!!! im feel sorry for uke rape him ok but try to fucking kill him nah man that is just too far.... and who are the people that came to rescues uke!!!!!!

My theory... when they were in high school they had mutual feelings, but didn't confess. And because the kidnapper was cute before, the other guys used his feelings and send him a letter with invitation to the werehouse. Then they gang raped him and he thinks that it's this guys fault, even though he didn't know about it, so he can't remember anything.

Tae yae

Tae tae
Luke's dick is monstrous Σ(っ°Д °;)っ
And unsensored (ノ≧∇≦)ノ
Im so glad it is T.T