Yuto Kamihira was a troublesome child who frequently received scoldings from his teacher. Surprisingly, his best friend, Yuki Sakashita, would also be scolded alongside him. While Yuto didn’t particularly mind the reprimands, he couldn’t help but wonder why Yuki would cry whenever they were scolded together. Seeking guidance, he confided in his mother, who happened to be an inventor. She came up with an intriguing idea: a “body swap” using a device she was currently developing. Taking her mother’s suggestion, Yuto decided to switch bodies with Hiroki for just one day. How did Yuto, now inhabiting Yuki’s body, experience this unexpected turn of events?