
I'm really disappointed with this lazy ending. Everything end up being so rushed and I was so confused when they start having sex just after this talk with father/boss... No conversation before, nothing to explain why they are okay now or if they back together... I thought that's just fantasy of one of the characters until ending summary...

I like the story up this point, but let's be honest here - MC is a scum. I don't like the love triangles where one person decide between the other two, cause this is a really stupid state of mind to have, like: - who gives you the right to leave someone hanging cause you can't figure things out? Cheating because you don't know if you want to keep relationship with your boyfriend or try your luck with your previous lover... and this whole lying make things so much worse than it has to be. If MC was more honest with his boyfriend, then I could probably see a great story with option of polygamy relationship (I kinda wish, that this would happen, cause both man are interesting and it would be much better to read about healthy non-monogamistic relationship and see how they all start creating something good by getting to know each other more and accept the new person in their life - even if they won't share romantic/sexual feelings).
Right now I feel bad for both of his love interest, cause his ex is thinking that MC is avaliable (He knows that he had sex with somebody, but he isn't aware that MC lied to him about being single, so he probably thinks that him and the person that called are just fuck buddies or something like that...). On the other hand, boyfriend have no idea, that MC cheated on him, and that it was 100% intended, cause you can't blame this one on alcohol... I just feel bad about him, cause he really seems to care about his bf, and he just do what he want's and hiding the truth.
Like I said, I would like to see something good coming out of this situation, but I really don't want MC end up choosing one boy over the other, cause:
1: It's a really not good cliche, and it's tiresome to read.
2: He doesn't deserve any of them right now...
It's only 10 chapters avaliable, so if he doesn't end up one of relationships for good before it's too late, then I really wish that he comes clean in the near future, so the whole cheating situation will be managed and there be a little of peace between the three of them in the end.
I really want to cheer for MC, but right now I just can't, cause I really don't like lying cheaters, but we will see what future brings us ╮( ̄▽ ̄)╭

But MC says so... Even if he know MC is seeing someone, then by saying that he's single, he admits that this isn't serious relationship - even if it's not true. So his ex receive a green light to go for it. He never met his actual boyfriend so he couldn't see their interactions witch each other to tell it is or isn't a "solid" relationship. Well, he could also assume that unknown person that called that night could be just friend with benefits of MC or maybe that it's just really fresh relationship that isn't serious yet, so I think, he's still in the dark here, mostly cause he thinks MC is fully available.

I think you are trying to be realist.
The ex boyfriend realized the uke has a boyfriend but he doesnt care. As the uke said, the ex boyfriend will do anything to get what he wants once he set his eyes on it. The uke is an asshole for cheating, but the ex boyfriend will try to seduce a cheater, so whatever happens to ex boyfriend, he is the one at fault if his heart gets broken. But i think the ex boyfriend isn’t in love, he made it look like he is just an asshole, probably just trying to have fun.

and I wish MC notice it soon, cause it's just terible what he is doing to him. He knows excatly that MC now do much more than just paintings - Cause painter's expression when he asked directly about it... the answer was so obvious even if he knew the truth before. He makes him belive that this is all alright, so he could have keep his position. MC adores his teacher, and he knows it and it's a really dick move to use it against MC.
Third kitty (=・ω・=)