Mozuya-san Gyakujousuru 1-3
YES YES YES, this might be the thing I've waited for for years! A series that's centered around
treating "Tsundere" like a dangerous and serious personality disorder!
After Mozuya-san gets introduced to her class as tsundere, and the class collectively acts really nice towards her. Unable to deal with this amount of positive attention, she snaps and starts swinging a chair around like mad, stopping all possible friends she could have gotten on her first school day, and probably for the much of her future school life for that matter.
The following day, as a prank by his school mates, the chubby and care-free Kabashima, who was absent yesterday, is fooled to giving Mozuya flowers and offering to carry her luggage. He obviously gets beat up.
Mozuya afterwards says to the whole class that this particular beating was not a case of tsundere affection, but she was genuinely creeped out by his leery smile. She tells the class that her disorder shouldn't be messed around with, then advises everyone to treat her like air,
so none of this stuff would occur again.
Except fate isn't so kind...
Embarrassed by a boy saving her from drowning,
Mozuya stomps him against the ground, hospitalizing him. Yes, he actually gets seriously hurt.
Now she's more unpopular than ever before, and succumbs to blackmailing the chubby Kabashima so she can have someone to hang around with.
At times there are some Koe no Katachi vibes going on with the bullying even if Mozuya's isolation is partially self-inflicted (she's appropriately uncomfortable with the thought of beating up people she likes, so she keeps people away with deliberate harsh attitude). This manga is occasionally also really funny and light-hearted, and the art is fantastic, as you might've noticed from the Pinhead reference panel.
READ IT, MANGAGAF, IF YOU HAVEN'T! It's an on-going series.
I'm so glad that when this kind of manga finally came up, I could recommend it so openly. So. GLAD!