Don't Toy With Me, Miss Nagatoro
You Got Your Wish, Senpai!; Sup, Senpai?!
S1 E2:
Nagatoro torments Senpai by threatening to suck his blood like a vampire and by making him play a nipple-finding game. Senpai escapes to a family restaurant, where he runs into Nagatoro and her friends and discovers something surprising.