* Based on a series of light novels written by Nishio Ishin and illustrated by Vofan. During October of his third year in high school, Araragi Koyomi is introduced to a transfer student named Oshino Ougi by his underclassman Kanbaru Suruga. Ougi wants to ask Koyomi's opinion on a strange discovery of hers. She draws him a map of Naoetsu High School and, judging by it, there seems to be something wrong with the building's floor plan. This observation as the starting point, a tale never meant to be told begins to emerge changing Koyomi's high school life forever. It is a story that reveals what made Araragi Koyomi who he is now. It is a story that reveals how it all began. — adapted from Crunchyroll Note: The first episode received an early screening at a special event on September 26 and 27, 2015 in Tokyo. The regular TV broadcast started on October 4, 2015.