Despite Renako Amaori's reclusive past, her high school life has become more lively due to her newfound friend group. However, her life turns upside down as two of those friends, Mai Ouzuka and Ajisai Sena, have confessed their love to her.

While mulling over what to do, Renako discovers another member of their group, Kaho Koyanagi, is actually her friend from elementary school! Though she seems like a different person now, Kaho still enjoys anime and manga, which brought the two together before. Moreover, Kaho is now a well-known cosplayer, and pressures Renako to cosplay with her.

Although Renako does not like the idea at first, cosplaying with Kaho begins to improve her self-confidence. But with the confessions still weighing on her, and Kaho making her own moves, Renako has to make up her mind—and fast!