Toilet-bound Hanako-kun, Vol. 13

Nene and Akane are rescued from the clutches of a horde of supernaturals by School
Mystery No. 6...who then immediately kidnaps Aoi?! With so many School Mystery
seats unfilled and the long, dark night of Urabon here at last, Aoi may be the only one
who can save the school from disaster--but at what cost?