Robertree

Like the ones where one of them start off as an angry person, kinda mean and stuff, but slowly go soft and become nice

I don't care which one the angry one is

Straight, school life, black and white about this girl(mc) she likes the ml and asks him to date her, he's basically like "nope no thanks" but after a bit I don't remember why he agreed to but he agrees to date her (I think for a certain amount of time)

After a bit of them dating, he starts getting jealous about random stuff (basically just huffs and puffs to himself about it). I think something made the girl upset, and he comforted her and told her that he does actually like her. That's all I remember