?

Nope, in the novel he continues to torture him more rather than killing him since jinwoo dying would be too easy for juyeon

So what happens when Jiwook eventually remembers what he did to Juyeon

Not really, he's still suffer with memory loss and get abused more

He gets trapped in guilt and becomes way too submissive and starts thinking that he deserves everything that is happening to him. He literally gives up his life no job, no education, no interaction with anyone other than juyeon while being constantly haunted by all the gange*pe he faced. It's pretty terrible.

Actually..what memory did he lose !?!?...

Actually..what memory did he lose !?!?...
Did he do something!?!

So, does it ever end, or the torture just continues till the end of the book?

Jinwoo...what did he do !?!
I have not read it from starting...I started from ch 21 so...I don't know what he did or forgot..

Juyeon wants revenge, yeah? Killing jinwoo would be too easy fate for him so he continues to torture without shooting and stabbing him since he actively wants jinwoo to suffer