Tachibana Kyou, a high school junior, experiences a tumultuous emotional upheaval as his all-boys school is graced by the arrival of a rookie nurse, the adorable, doe-eyed, and baby-faced Hirota Natsu. Undeniably smitten by his new teacher, Kyou forsakes his promiscuity to pursue his newfound love, but the controversial nature of their relationship as student and educator looms heavily over them. Will their bond withstand the trials ahead?