Yes . And why would be even wanna start up relationship with this girl when he is gonna die in few months ? Like ? Just let her be attached and hurt later ? Same with kangjae as well .
Like none of how he is acting is odd. People do out of character, irrational, and or cruel stuff that they normally wouldn't do when they have a tumor in certain spots of their brain, because the tumor is pressing on part of their brain. He's literally doing stuff randomly even if it doesnt make sense and going "wait why did I do that" and doing other things with no rational.
It's literally cause he has a tumor, and since no one else knows that he does, he doesn't have anyone to stop him from doing dumb stuff.
Being terminally ill does not give you a free pass to being a fucking asshole! You know how he feels about you and you use him for that! Now you're out here doing more stupid shit, kissing a girl you dont like. I literally cannot root for you or cheer you on. Yes you're sick and dying, but why would you spend your last few moments being a douchebag and hurting the people around you. SMH. Not saying he's the worst character btw.