Transferring to a troubled high school as a temporary teacher, Itsuki Sara finds herself surrounded by delinquent students who gather in the school's backyard. The administration cares only about their own interests, ignoring the students' futures. Determined to guide her students toward becoming responsible adults, Sara devotes herself to teaching with passion and integrity. However, her dedication draws the unwanted attention of a lecherous vice principal. Using meetings as an excuse, he repeatedly calls her into his office and subjects her to near-sexual harassment. Her teaching career soon becomes fraught with hardship and exploitation.