can someone explain to me what's with the pink hair guy and mc?? 😭

I’ll explain from what I know- the pink hair is jealous of the mc. Since the mc was a kid back than it’s normal for them to follow the person they admire. But the pink hair didn’t like that the mc was following his stepbrother and hurt the mc, to the point of losing his memories during the incident.

I see! That explains a lot, thank you