Guy reunites with middle school ex-friend and seeks revenge for ex-friend saying that they didn't think they were friends which broke his heart kind of. He ends up falling for ex-friend in his revenge.
Interesting plot, from the summary POV. Ended up being kind of meh. Uke cried too much for my liking. Nothing in particular I hated or liked about it so it's meh.
Kono Ore Ga Omae Nanka Suki Na Wakenai