Maybe cs im too slow?

i can answer 2, it's the bookcase. he was a kid, so he can't push something that heavy so he destroyed it using a hammer to save soowon xD

Thanks, now i just need 1 and 3 lol

I’ll try and answer 1 and 3.
In one of the chapters it said that Soowoon’s dad although was a good father might not have been a very good person. Meaning that Soowoon most likely believes that his father did most cheat Seokjo’s father in some sort of business deal which lead to his suicide. (Or at least that’s what the author hinted at in my opinion)
3. I think that those were just people Seokjo was messing around with (probably sex friends) In the character notes it was stated that he had never been in love before (in the earlier chapters) so I think he was just filling the void with meaningless hookups.

Kinda picked up on it along the way but anyway thank you!