The fifth part of the Monogatari Series kicks off with the Yotsugi Doll arc, adapted from the Tsukimonogatari light novel. We join Koyomi Araragi as he prepares for his college entrance exam in February, sharing a bath with his sister Tsukihi. After Deishu Kaiki's resolution of the Nadeko Sengoku incident, Koyomi begins to experience some bodily changes. Looking to Shinobu Oshino for guidance, he contacts Yozuru Kagenui and Yotsugi Ononoki to explore the possible cause - whether this shift reflects a form of retribution for Koyomi's past actions.