Responses
It seems like he’s always been after Kwon but keeps on being rejected. Probably not this extent but at least tried to get closed to him. It could be the accident triggered something that prevented them from meeting so often. Maybe he had his memories but couldn’t do anything until the time was right. That asshole guy can be someone from the past who probably caused a lot of problems for Kwon and Yooyoung. He could even be the reason behind this whole karma thing and that’s why Yooyoung ended up hurting him or something.
ok so I'm extremely intrigued about what's going on in Shin's head outside of Kwon. He says he doesn't remember that guy or anything up until being in the hospital and dreaming about Kwon, but claims what he did was an accident and he'd never hurt Kwon—like I'm very interested to know what transpired during his NDE to unlock his obsession with Kwon and their past lives, but completely "erased" everything else