Having led a peculiar high school life filled with eccentric relationships with otherworldly beings, Koyomi Araragi is surprised to find himself sucked into his bathroom mirror on graduation day. He is now trapped in a bizarre, reversed world where things are not as they seem. Karen Araragi is now shorter and Yotsugi Ononoki is suddenly emotional, while the cute ghost girl Mayoi Hachikuji is now a grown woman after a remarkable transformation. As Araragi navigates this strange new world, he discovers that not everything is as it seems. Zoku Owarimonogatari chronicles his journey in this strange new world as he endeavors to unravel its mysteries and find his way back home.