Futaro Uesugi, a brilliant but broke high school student, is hired to tutor five sisters from the wealthy Nakano family. The catch? They’re quintuplets—Ichika, Nino, Miku, Yotsuba, and Itsuki—and they all have terrible grades and zero interest in studying.
Initially, Futaro clashes with the girls, each of whom has a distinct personality and their own reasons for resisting his help. But as he earns their trust, he becomes entangled in their lives, helping them grow academically and emotionally. Over time, romantic tension builds, and the series teases a future wedding—where one of the quintuplets will become Futaro’s bride.
The story unfolds through school events, family drama, and personal revelations, with each sister getting her moment in the spotlight. The mystery of “who he marries” drives the narrative, but the real heart lies in how each character matures and how Futaro learns to connect beyond academics.