Toilet Bound Hanako Kun Manga Volume 5

Nene Yashiro serves as the assistant to the School Mystery Hanako-kun. When she is invited by enigmatic playboy Natsuhiko to a mysterious tea party, she meets Hanako-kun's 'girlfriend' and his 'little brother'...!? On top of that, she learns that one of the Seven Mysteries is mixed in with her classmates... Ages 13 And Up