What kind of title is this?: Manga.
How many volumes are there?: 13 volumes are listed.
How many chapters are there?: 69 chapters are listed.
Where can I read it?: Reading links are listed for Kodansha USA, Official Site, K MANGA. Check availability in your region.

Synopsis

About My Little Monster

Mizutani is a self-absorbed overachiever, concerned only with maintaining the highest grades in school. Haru is an impulsive short tempered brute, who scares everyone with his explosive bursts of violence. Haru gets suspended on the first day of school when he encounters some bullies harassing a student and dispatches the bullies with great bloody violence. Mizutani is tasked with delivering school materials to Haru who interprets this as an act of friendship and latches on to Mizutani, much to her dismay. And so begins a strange and potentially combustible relationship! (Source: Kodansha USA) Note: Includes 17 extra chapters.

Comedy Romance Slice of Life