Kufufu.. Haimiya Is Scary Cute (灰宮先輩は怖くてかわいい) from a manga written and illustrated by Sumu Kamiyama.

Pretty much short the description goes along with this...

Haimiya is a second-year, the girl everyone whispers about and no one dares approach. Silver wolf-cut hair, sharp eyes, a row of piercings, and a Kansai accent that turns even "good morning" into a threat. Rumor has it she's scary. Rumor's only half right.

This is kind of a slowburn yah? But it doesn't matter really, it's up to you the chatter, if you don't want to beat around the bush.