Aya is busy preparing for her wedding when the designated mediator suddenly cancels. Forced to find a replacement, she asks her former teacher, Hidaka, who taught her during her ●● school days. When they reunite days later, memories of their innocent student-era romance resurface. Aya, still holding onto purity until marriage as taught by her grandmother, questions whether Hidaka has remained as pure-hearted as she has. In response, Hidaka smirks mischievously, setting the stage for an unexpected turn of events.