Everyone keeps saying that he deserves it. But I think before the main character went back in time there was some kind of a twist and that's why the seme was acting like that. Because when the main character left crying, the seme called out 'hyung' in a sad manner and the other guy with red or pink hair was smirking. In that sense I feel bad for the current top MC.
@Sleep lover ? Still!! I remember saying the same never really told him he loves him or such meaning to say he haven't treated him lover like before the misunderstanding even came in haist I do hope they'll explain why he acted like this though