Toilet-Bound Hanako-Kun, Vol. 6School Mystery No. 1s Clock Keeper of the future has gone out of control, turning Kamome Academys 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 Nenes secret out into the open