Monthly Girls' Nozaki-Kun, Vol. 13 (manga)

In the world of Nozaki and friends, pandemonium reigns supreme. Whilesearching forthe owner of a rather-unique-book, Hori stumbles across ashocking secret! At thesame time, the life and times of Sakiko Yumeno arerevealed online...And what's this?Might Wakamatsu actually be able tostay awake the next time Seo sings?! But all ofthat pales in comparison whenthe true agent of chaos, Kashima, introduces a newpartner-in-crime whowreaks havoc wherever they go...