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Yumi works as an office manager for a tutoring company. She considers Kouta worthless due to his nasty personality, but he forces her to assign him to a difficult request using unscrupulous means. Kouta has a history of accomplishing his assignments by any means necessary, which has recently led to a lawsuit against the company.

The request comes from Chiaki, the office chief, who wants Kouta to tutor the acquaintance's beautiful twin daughters, Kasumi and Mitsuki. The twins have a shady history of driving away all prior tutors by pulling practical jokes. Kouta decides to use any compromising trick possible to force them to behave and complete the assignment.