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... Author: AidaIro Publisher: Yen Press Publication Date: 27 Oct. 2020 Paperback: 1 81 pages ISBN-10: ‎197531137X Reading age: ‎ 1 3 - 16 years Dimensions: 13.21 x 2.16 x 19.3 cm