A high school romantic comedy with five times the cute girls! A high school boy must work part-time to help five sisters study so they can graduate, but the only thing these quintuplets have in common is that they all hate studying! IN DEEP WATER Futaro Uesugi is doing his best to tutor the quints and keep them from flunking, and things are finally going smoothly. But suddenly, Nino and Itsuki have a falling out, and both girls run away from home! Meanwhile, Yotsuba prioritizes subbing in as an extra for the track team instead of making sure her grades are on track! As if all that wasn't bad enough, the mysterious girl from Futaro's photo shows up... Will the sisters and Futaro ever have time to study for finals?!