First-year high school student Risa Koizumi is 5'7". She and Atsuhi Ōtani (5'1") are considered their class's lopsided comedy duo, and have so much in common that a "love fortune" machine tells them they're 100% compatible - but in fact all they do is bicker. Right now, they're competing over who can hook up with someone first, and Ōtani's ex-girlfriend shows up and says that she has something to tell him! It looks like they might get back together, but it turns out that she has a new boyfriend, and all she wanted to tell Ōtani was that his height wasn't the reason she had dumped him.
Meanwhile, Risa's childhood friend Haruka suddenly appears and starts going after her! He constantly puts down Ōtani, who's always by Risa's side, and Risa for some reason finds herself defending him. When Haruka asks her if she's in love with Ōtani, Risa gets very flustered!