What kind of kids/school is this? Single person evilness in this is worse than my all schools combined.
Teacher basically allowing for borderline torture/corporal punishment or what is it called, cause he wanted a scape goat if to believe other people spoilers is just a sad excuse of a human being.
I hope next chapters will be actual punishment/revenge part, cause 3 kindaish long chapters of pure evil brainless characters basically doing group think behind one jealous cunt, one sad excuse of a girl trying to fit the group and one asshole dude whose card got stolen by a teacher and who believed the teacher it was the girl is just fine intro, just a bit to hard to read without the payoff existing.
Also these authors stories are kinda weird, if I am not mistaken - all of them have more or less the same premise - something happens to characters and years later they finally start getting their revenge. At least the revenge is mostly OKish and actually happens. Most mangas with revenge in their theme - have no revenge ever happening, it happening only to like 1 person out of 100, or its exaggerated and stupid like that gay-lords duo from Jujika or what was its name (its so bad my brain forgets the title in 5 seconds after reading it XD).