Chubby, berated, and belittled by his younger co-workers, Rentaro, a 45-year-old man, yearns for the chance to relive his glory days from high school. "If only I could have one more shot... my life wouldn't be this way..." Despite his claims of past popularity, his colleagues find it hard to believe. Then, one miraculous day, Rentaro finds himself thrust back into his high school years. Could this be his chance to rewrite history and regain his former status? However, his excitement is short-lived when he realizes he's not inhabiting his own body, but that of a normal, unassuming girl from his class. As Rentaro grapples with this unexpected twist, he begins to question the true nature of his past popularity... Was it all a lie?!