Christmas (クリスマス, lit. Kurisumasu)
Asako plans a surprise Christmas party to be held at Mitsuyoshi's batting cages however the surprise is spoilt when Shizuku confronts her. On their way to buy food for the party, Haru's punk friends invite themselves along with Kenji.
The party turns out to be not quite what Asako intended but everyone seemed to enjoy themselves although Haru is now caught in a love triangle with Shizuku, Chizuru, and Yamaguchi. Sasayan also makes note of Asako's infatuation with Mitsuyoshi which disappoints him somewhat. While outside, Haru threatenly tells Yamaguchi to stay away from Shizuku, however he refuses; even questioning why he fell for her in the first place.
Later when Haru walks Shizuku home they talk about an analogy for their relationship in the form of Ryūnosuke Akutagawa's story, The Spider's Thread. At the end, Haru admits that he is jealous of Shizuku attending winter cram school with Yamaguchi, but after months of thought, and Yamaguchi's advice, she finally confesses to Haru that he shouldn't worry because she does indeed love him, which makes him happy. However, Haru mistakes her confession as a promise to not go to the cram school, which she does anyway. Haru makes a scene in public when she is with Yamaguch, resulting in her snapping at him. In the epilogue, he continues to embarrass her even after one class is over, making sure she "goes straight home." They also walk past Oshima; finally seen together with her friend Yū Miyama, who teases the former about her affection for Haru.
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