I generally find stories about harassment to be quite repetitive, but in this case, I find that the story sorely lacks realism in the characters' actions, + there is unnecessary violence. I just feel like I'm reading a story where the bad guys are bad for no reason. I can see the interactions coming a mile away, and the characters are defined by only one or two traits. Why, in this kind of manga, is the main bully always a mastermind who is three steps ahead? This kind of story is repetitive.
This manga exists just to shock and doesn't tell a relevant story. I don't know what the author had in mind. It's one of the worst manga I've ever read in my life. Is it a trend to include gratuitous violence absolutely everywhere without justification?