Unknown

When Koyomi Araragi's strange high school life ends, he's unexpectedly pulled into his bathroom mirror and finds himself in a bizarre alternate world. His relationships with Karen Araragi, Yotsugi Ononoki, and Mayoi Hachikuji change dramatically as they all take on different roles in this topsy-turvy place. To get back home, Araragi must discover why he's there and deal with the surprising changes in his friends.