Spring, a time when one has finally grown accustomed to high school life.

Inarizaki High School is home to a boys' volleyball club known nationwide. At its center are Atsumu Miya, hailed as the "High School No. 1 Setter," and his twin brother, Osamu Miya. Their skills are guaranteed, but their bickering is a daily occurrence. While those around them are half-exasperated by the "troublemaker duo," they lead the team with their sheer talent.

These two have a childhood friend they have grown up with since they were small.

Handling both studies and sports with ease and treating everyone without discrimination, she has earned deep trust from the students and serves as the Student Council President of Inarizaki High School.

The free-spirited Miya brothers and the highly responsible Student Council President.

The three seem like polar opposites, but the bond they have built since childhood is unbreakable by anyone.

Today again, the voice of "Atsumu, Osamu! You two again!" echoes in the student council room, followed immediately by the familiar exchange of "Shut up!" and "Atsumu's the one at fault this time!" ringing through the school building.

—This is a story of the slightly noisy, yet somehow warm youth of the "troublemaker duo" aiming for the nationals and their childhood friend, the Student Council President.