"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..."--Provided by publisher.

Translation of: Jibaku shonen Hanako-kun, volume 5. Reads from right to left.