I don't agree with youu, because i don't see what's wrong about having sincerely loved someone, feelings don't vanish just because they're no more in a relationship, he can't forget him, it was his first love, and more than anything, they laughed together, hurt each other, there are memories linking them, and that won't disappear, love does not disappear like that, but it does not mean that he can't love Haru, or that he will necessarily hurt him because of the past, not everyone is like that, he's trying to move forward because he too was hurt, he's finally setting things right for himself, I don't see why this is wrong, or why it can't be him, memories are not a fatality after all, well that's what I think
I read the spoilers that people are posting. I really loved Kaji and Haru at first, they seemed like a great couple and Kaji was flirting with Haru. I thought that maybe Kaji loved Haru or at least was interested in him.
When I saw the guy who lived with Kaji (Sorry, forgot his name) I just immediately understood that, well... Haru will suffer.
I hoped that maybe it would be one of those Mangas in which the character (Haru) stops loving the second character and falls in love to another person. I actually think that this will be the best ending for Haru, because I have the feeling that no matter what, Kaji won't forget his lover and will always remember him. I have the feeling that he is not fully in love with Haru.
Ahh, so these are my thoughts and all.
(Sorry for my bad English QwQ)