1화: 코야나기와 카바쿠라는 친구들에게 고등학교 배구 라이벌 관계와 결국 사랑에 빠진 이야기를 들려준다.

1

Narumi and Hirotaka bump into Koyanagi at the coffee shop, who mentions she'll be going with Kabakura to a 2.5D show about high school volleyball. They recall how the two used to be volleyball captains in high school, in 2nd and 3rd year respectively, with Koyanagi saying how they used to be like enemies, prompting them to pressure her to tell them how they eventually become a couple. In high school, Koyanagi and Kabakura used to fight over getting time to practice in the gym, with Kabakura using his seniority and tenacity to force the girls out. However, Koyanagi blackmails Kabakura with a photo of him looking at otaku merchandise, begrudgingly giving the girls more time to avoid being exposed. Sometime later, Kabakura sees Koyanagi practicing jump shots alone, and in an attempt to show off, inadvertently leads Koyanagi to become entranced by his skill and asks him to teach her, which he agrees if she deletes the photo. Back at the coffee shop, the two listeners debate who confessed first, with Narumi choosing Kabakura, and Koyanagi for Hirotaka, before she continues her story. During their practices, Kabakura lets slip that he imagines his favourite anime theme song whenever he does his jump shots, which Koyanagi admires thanks to his earnestness about his feelings. During the final game before Graduation, Kabakura's team loses and he's consoled by a just as heart-broken Koyanagi. After Graduation, the two meet outside thanks to a letter Koyanagi wrote. They exchange their usual quips towards each other before heading off in their separate directions, with ultimately the two of them turning around to embrace the other, not wanting to lose their relationship. After finishing the story, Kabakura rushes in to scold Koyanagi for spilling it all to them, with the two once again arguing over who actually hugged the other first. Narumi and Hirotaka secretly look over to Koyangi's phone, realizing she never actually deleted the photo, and as her and Kabakura head off to their show, Narumi comments that she knows why she couldn't delete it. (Source: Wikipedia)