Toilet-bound Hanako-kun, Vol. 7

Nene has suddenly been dragged inside a mirror, where she meets the spirit
of a young boy calling himself Mitsuba. As they try to escape, the threat of
School Mystery No. 3, the Hell of Mirrors, draws ever closer. Nene may have
finally gotten herself into a mess that even Hanako-kun can't save her from-but
will someone else come to her rescue...?