
My theory. It's a humiliation ritual to shatter to pieces the mental stability of MC/Mr. Park Taewon. He is going to be so traumatized, drained and so broken that his only "exit" is to rely/depend on Sangwoo as his "savior".
You know, Sangwoo planned everything (converting him into an omega, the repetitive r*pes, vulgar and sl*tshaming verbal abuse, threatening his job, and g-r*pes). So, he may as well be able to stop it all and...just give him what he wants, plus there are some tidbits of him worrying about Sangwoo's love whenever he becomes a full adult outside of college. Ahhhhhh, my poor Taewon, nooooooooo...༼;´༎ ༎༽
So going off a spoiler I saw in the comments. What the fuck is the point in letting people rape the father and having your friends do it as well? (Like you put your friend in the hospital because he talked about him) Like help me understand where the heck this story is going and why he's doing this to him?.