Responses
Spoiler:
No. He wasn't raped. At the beginning at the chapter 2, he put something into his b*tt (I think it was one part of the experiments that he had to undertake with the "green medicine" to make him have reaction like Omega down "his private part"). So later Lee HanSeok just checked it (as HanSeok said "spread (your legs) wider so I can see it more clearly).
Oh okay okay, thank you.
SPOILERRRRR
wait, I'm hella confused, I read the Vietnamese chapters and I have a question to asked?
Was he raped in chapter 2?