Toki Kanade is a troublemaking delinquent high schooler. After yet another fight with other delinquents, he's sternly reprimanded by the vice principal. Unexpectedly, gym teacher Kazuro Sahara intervenes. When Kanade asks why Sahara stood up for him, Sahara replies, “Fighting’s wrong, but it’s also wrong to scold someone without hearing them out.” Touched, Kanade decides to return to school regularly—just to see Sahara again. Thus begins a clumsy and heart-fluttering romantic comedy between a PE teacher and a delinquent student.