Ew the mom sucks, sided with her over her own child, didn't even let him explain, basically just physically abused and oppressed him..
Also, stop being so desperate to make up with that bitch friend who used him selfishly and then threw him under the bus, didn't even help when he was alone and bullied. Cosmos did the same but at least she's only a senpai and not childhood friend. Literally the worst girl. She should be the one doing a dogeza and apologizing here...