The story revolves around high school student Akira Uehara, sensitive and demure by nature. Despite that he has a large crush on the most feared and violent girl in school-Nanako Momoi, who seems fragile and cute, until she opens her mouth. One day, Uehara is made to go to Momoi's house where he meets her mad scientist grandfather and unwillingly becomes the test subject for one of his machines. Accidentally, Momoi alsogets tangled in the experiment and the two end up switching bodies. To make matters worse Momoi in Uehara's body breaks the machine (which will cost 2mil. yen to fix) as she would like more time in this body thus beginning their world full of debts and troubles.

村上真介（坂口憲二）の今回のクライアントは、東証一部上場の建材メーカー。200人の希望退職者がノルマだ。どんなに恨まれようと、殴られようと、真介は冷酷な面接で次々と面接相手を“希望退職”に誘導する。しかし、課長代理の芹沢陽子（田中美佐子）だけは、断固として退職を拒否する。仕事に一生懸命で気の強い年上の陽子に、真介は徐々に魅かれていく―――。