In the concluding part of the Monogatari Series, the third season unfolds with arcs like Ougi Formula, Sodachi Riddle, Sodachi Lost, and Shinobu Mail adapted from the Owarimonogatari light novels. During October of his third year in high school, Koyomi Araragi encounters a new transfer student named Ougi Oshino, introduced by his junior Suruga Kanbaru. Ougi seeks Koyomi's advice after discovering something unusual on a map of Naoetsu High School. This revelation leads to a forbidden tale that reshapes Koyomi's high school experience entirely, unraveling the essence of his identity and the genesis of his journey.