OROKAMONOGATARI Tsukihi Undo

S9 E1: OROKAMONOGATARI Tsukihi Undo Yotsugi Ononoki infiltrates the Araragi residence to keep an eye on Tsukihi Araragi; Yotsugi freely spends her time while Tsukihi is at school, but she is seen when Tsukihi suddenly comes back home.