School Mystery No. 1's Clock Keeper of the future has gone out of control, turning Kamome Academy's entire student body into wrinkly old people! Hanako-kun, Nene, Kou, and Akane will have to work together to catch this agile trickster and keep the school from becoming a retirement home. But just when they seem to have Mirai cornered, one final prank goes horribly wrong, bringing Nene's secret out into the open...
- Publisher : Yen Press (December 8, 2020)
- Language : English
- Paperback : 183 pages
- ISBN-10 : 1975311388
- ISBN-13 : 978-1975311384
- Reading age : 13 years and up
- Grade level : 8 and up
- Item Weight : 4.8 ounces
- Dimensions : 5.05 x 0.9 x 7.5 inches