Don''t Toy With Me, Miss Nagatoro Manga Box Set 3

Don''t Toy With Me, Miss Nagatoro 3rd box set is here! Includes volumes 13-18 of the manga, box with Nagatoro artwork, plus a bonus item. Nagatoro is a freshman in high school who loves teasing and torturing her older male classmate. What is her motivation and why does Senpai put up with her? Does Nagatoro just want to create misery for Senpai? Or maybe she secretly likes him?