Haimiya-senpai wa Kowakute Kawaii

At my high school, everyone fears Haimiya-senpai. With her sharp piercings, striking grey wolf-cut, and that brutally honest Kansai dialect, she has a reputation for being downright terrifying. Yet, for some mysterious reason…this intimidating upperclassman is kind and gentle only to me! The curtain rises upon this heart-fluttering romantic comedy about a terrifying-yet-sweet senpai!

Source: Manga UP! Global

https://www.manga-up.com/titles/1626