@Tiara. Your title of your thread is “ I hate it when people make out with someone else because they got heartbroken or whateva..”
The reason for why he is kissing her is revealed in the chapter. If tapas sticks with the Korean it is not want you think.
This is a link to what is wrong with Tapas chapter 46. And in one of the comments has the spoiler for other chapters but Tapas could change things. http://www.mangago.zone/home/mangatopic/6623830/
He is drunk. He has no rational thinking. Drunks are irrational and do crazy things. So yes it kind of does. He is not accountable for his actions. But however I was not excusing him for being drunk but The reason he is kissing her will be revealed next chapter. Or you can read my spoiler. I think that is excusable
Oh yeah. If he is kissing her because he liked her or wanted to kiss her. He is single not dating Hajin. So he has no reason to be excused. But spoiler alert. He thinks he is kissing Hajin.

they better fucking communicate bc im tired of this shit