Koyomi Araragi contemplates the current state of his life post-graduation when he suddenly gets pulled through the mirror into a mysterious yet familiar world...

While taking a bath in the Kanbaru household, Koyomi has an encounter with an unknown yet familiar face who starts up a conversation about knowledge.

Shinobu and Suicide-Master reunited for the first time in 600 years. In contrast to the two rejoicing at their reunion, Izuko delivers some news to Koyomi.