The members of Senkō High School's literature club become shocked when Jurai Andou, a boy usually known for his 'chunibyo' delusions, suddenly develops superpowers of his own. Six months later, each of the club members have since developed their own superpowers, which they put to the test in their monthly check-up. When student council member Mirei Kudou comes to check on the club, she ends up misinterpreting Jurai's chunibyo behavior and inadvertently reveals that she herself has developed superpowers as well. Mirei challenges the club to a superpower battle, using her own ability to steal Jurai's "Dark and Dark" ability, only to find it to be nothing more than a useless lukewarm flame. With the other members knowing not to show off their powers before her, Sayumi easily beat Mirei in a physical match. Learning that Mirei learned of the club's powers from an anonymous text, the group become curious about just who sent it.

After working with the Literature Club members to make a personalized video game for Jurai's birthday, Sayumi Takanashi, who has the power to revert things to their original state, catches a cold. Jurai pays Sayumi a visit at her house, where he meets her younger sister Maiya, though Sayumi attitude suddenly changes when Jurai bring up how she was the student council in middle school. The next day, after Jurai hears from Maiya about how Sayumi had originally wanted to join the student council during high school, Mirei theorizes she may have turned it down due to her powers. This leads Jurai to recall an incident that happened ten months ago in which Sayumi, who suggested they use her "Root of Origin" ability to remove everyone's powers, battled against Jurai who was against it. The result of that battle showed that Sayumi's power could not erase Jurai's Dark and Dark, as their powers were meant to be accepted as part of themselves.