What happens when a group of sisters are in desperate need of tutoring in order to keep them from failing high school? Obviously they'll need tutors, and what happens when the two top students in their high school are called in for the job? Futaro Uesugi, and Y/N Uesugi, the two top students among their grade and school, are suddenly asked to teach a group of idiot rich sisters. Just what crazy adventure awaits this insane study group?