At this point i really need to see what was the bulling that she inflicted on him, like a reference point to understand the hate, like how much would have been for the guy to do the whole "we cool and i care for you" thing just to jump to the nearest train in order to inflict emotional damage to her.
Also what happened for her to change her view on stuff, to the point where she is pretty much willing to be a punching bag in order to... i want to say atone?, but i don´t know.
I always thought that with bulling manga/manhua you had either pure drama or "my dad is ridiculously powerful and i handle the yakuza while my friend has the police in his pocket all the while we are just highschoolers" type of story
but now i have a third, the confusing type