Yumi serves as the office manager for a private tutoring firm. One day she is asked to place a tutor, but the only available employee is Kouta, whom Yumi deems useless because of his unpleasant demeanor. Upon learning this, Kouta coerces her into assigning him to the job through dubious tactics, citing his flawless record of completing assignments. This forced placement has triggered a recent lawsuit against the company.
The assignment is to instruct an associate of Chiaki, the office head. His twin daughters, Kasumi and Mitsuki, have a notorious reputation: previous tutors sought reassignment after pulling various practical jokes to escape them. Kouta resorts to any compromising trick to compel the girls to learn in a structured environment. Despite their resistance, the girls reluctantly accept the lessons, hoping to improve their academic standing.
