???

ikr!!（/TДT)/

For me their friendship is really unrealistic thing. It doesnt look like they have any warm feelings for each other.
It looks like they only sticked together because Jinwoo likes Woojung, Seohee likes Jinwoo and Woojung liked Seohee. But its creepy because Seohee and Jinwoo used to be friends before Woojung (IT looks like it) but when she kissed him and confesed it looked like he didnt give a flying fuck about her feelings,he brushed her off,didnt try to talk,make her understand. Nothing. He is really cold to her,although she isn't much worse than Woojung and he treats him kindly.
Woojunh's bffs should be Jinwoo but... Lol he always hurt him. And wasnt really considerate about his feelings,he is only interested in what Seohee wants.
And Seohee... Doesnt give a fuck about Woojung,she pretends to be his friend but she doesnt even acknowleged his feelings,it doesnt matter that she hurts him over and over again and manipulates him because she only is interested in Jinwoo.

It has been all fun and games so far. Their friendship hasn't been really tested beyond the easy things of hanging out together and sharing fun things.
Just the fact that Woojung never told any of them that he had a twin brother is a bit indicative that these 3 were best friends but not that deep close.
Plus, I don't know but even if their friendship was really, really strong, having this kind of triangulation of unrequited love can destroy any friendship. Soehee nursed a crush on Jinwoo, Jinwoo nursed a crush on Woojung and Woojung nursed a crush on Soehee and none of them reciprocated the other. Things gets worse because Soehee and Woojung do act way below their age as far as maturity goes.
So it's not hard to understand that they had been friends until now when their true colors and feelings remained secret. Woojung's homophobia ( and I think Soehee is also homophobe) would have been a problem either way. If Woojung had confessed his love for any guy, how would Woojung react? If he holds such a grudge about his brother being gay, would he be just okay with his best friend fucking guys? Probably not.
Question is if their friendship can survive their real personas: Jinwoo is gay and dating Sarang; Woojung has both a homophobia and immaturity problem and so does Soehee. And on top of that Woojung and Soehee are stuck in their respective unrequited love.

I dont think that they were in reality friends at all. Their relationships were really superficial. And each of them only cared about one person in their triangle.