Don't Toy with Me, Miss Nagatoro 2
From the Penguin Random House website:
“Nagatoro is back and toying with Senpai more than ever…and the two only seem to be getting closer to something more than “just friends.” Armed with a lollipop, a bathing suit, and an ear-piercing gun, Nagatoro just might send Senpai—and herself—over the edge.”