15-year-old Goro Inagaki has just graduated from middle school. Blowing his last chance to confess to the girl he loves, Shiina Fujitani, he gets depressed and contemplates suicide. But just as he comes to his senses and decides life is worth living, his slips, hits his head, and dies anyway.

However, it turns out his number wasn't meant to be up. Due to a clerical error in heaven, Goro died instead of another man with the same name. But when the angels try to fix this, another mistake lands Goro in the wrong body: a beautiful young girl the same age as him, a well-to-do millionaire's daughter, Hitomi Kusanagi, who also just so happens to go to the same high school as Shiina. What's more, Hitomi wants her own body back, and won't let Goro ruin her chances or her reputation.