Right after having a bath, Koyomi, dressed with only a bath towel, confronts his younger sister Tsukihi about Karen. After the younger of the Fire Sisters asks Koyomi not to be mad at Karen, their conversation suddenly veers off-course when Tsukihi displays her hysterical side. It turns out that Tsukihi is hesitant to tell about what happened to her Karen, and she would end up delaying the topic until the commotion she makes causes Tsubasa Hanekawa, who is tending the feverish Karen, to go down stairs and scold the two.