nA miniskirt Santa appears before Sakuta, calling herself Touko Kirishima. Shes been handing out presents--Adolescence Syndrome. And one of the lucky winners is Sakutas classmate from middle school, Ikumi Akagi. According to urban legend, posts tagged #dreaming are filled with prophetic visions and Ikumi is using those posts to play hero. Sakuta sees the results of this firsthand when he spots her saving someone. But then a poltergeist attacks and apparently this is all the fault of his past somehow?!