Tatara Tani is so average it hurts—the only thing he has going for him is that his childhood friends are ultra-popular idol Yuriko Hanazono and her fashionable twin, Rinko Hanazono! They’re both his classmates, and his long standing relationship with them makes others seethe. So he thinks he’s hit the jackpot when Yuriko asks him to the amusement park with her, even though idols aren’t allowed to date. She dresses up as Rinko to fool the world, but when her ruse is discovered by the school, it’s up to Rinko to save her sister’s reputation…by dating Tatara herself? This crazy rom-com of errors begins!
Between being busy as the all-in manager of Ranko’s school band and having a study session with Yuriko, the average high schooler Tatara Tani wouldn’t think of fooling the whole school with his ongoing fake relationship with Ranko. When the summer break starts, Ranko and the gang’s motivation to practice becomes even more extensive as the school festival becomes closer, and Tatara tries to find ways to help the band in his own way. All that while juggling a top-secret trip with Yuriko and gourmand dates with Ranko?! The twins are going on the offensive this summer!