"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. "First published in Japan in 2017 by Square Enix Co., Ltd."--Colophon "Originally published as an ebook in April 2018 by Yen Press."--Colophon