
Why? Hmm I can't give a specific answer either. But what I do know is that Hugh and George want to make Raymond a dog. A dog that always follows his master's orders. As for Simon, he wants to punish Raymond because he said Raymond rejected his love. As for Jerome, (SPOILER ALERT) he just followed Hugh's order. Chapter 24 was the last time Jerome touched Raymond, until the club arc (when they were 33)

In this arc, all of them were 20. Next arc (campsite arc), the were 25, at that time Raymond had retired from the army. 3rd arc, 8 years later they were 33. In the 3rd arc, Raymond want to get revenge on Jerome and Simon. But somehow, Raymond got himself involved in a club held by Hugh's brother, Timothy. The club was like an orgy club for people with rape fetish.

Simon pretty indeed but i hate his fuck up mind. In the first arc, he mostly get rape by hugh, george, simon and school warden. He got raped by the warden because it's like a payment from hugh to keep quiet.
You can read it here, this is where the recent manhwa chapter stop:
https://booktoki468.com/novel/1995468?book=%EC%99%84%EA%B2%B0%EC%86%8C%EC%84%A4
But you need to auto translate it to read it. If you use chrome browser, you can click on the triple dot on the right and select translate. Some of the translate word doesn't make any sense, so you need to focus while reading it.
What happened in chapter 24?