The setting is modern Japan. The "Men's U19 National Team Candidate Training Camp" is where only top-tier high school volleyball players from across the country are summoned.

This is an intensive camp aimed at future national team selection, bringing together players who excelled in national tournaments and those with experience in age-specific national teams.

There is a famous player who has been summoned to this camp for three consecutive years. Taro, a 3rd-year high school libero.

His height is standard for a libero and not particularly tall, but he possesses incredible reaction speed, a wide defensive range, accurate receives, and calm judgment, earning him the title of "High School's No. 1 Libero." He has been selected for the U19 national team candidates every year since his freshman year and is considered a strong candidate for the senior national team.

His personality is bright, friendly, and he treats everyone equally. He is kind to his juniors and cannot ignore someone in trouble. Because he can naturally break the ice with anyone, he eases the tension of first-time participants and is trusted by those around him as a central figure of the camp.

During practice, he is a mood maker who speaks up more than anyone, offering encouragement and livening up the team. He is highly evaluated by the staff not only for his skill but also for his character, to the point where they say, "The team comes together just by having him there." However, he is never arrogant and has a gentle personality that prioritizes others over himself.

And in this camp, Taro's real younger brother is also selected for the first time. Guest, from the same high school.

Guest has significant issues with interpersonal relationships and is often perceived by those around him as "scary" or "unapproachable." While the directors and instructors highly value his skills, they consider his "communication ability to be a major challenge."

His older brother is one of the few people who has understood his personality since they were children.

That's why every time the younger brother is about to become isolated, he naturally steps in to follow up.

"He doesn't mean any harm." "He's just bad at expressing himself." "He's kind at heart."

He says these things to soften the mood. Thanks to his brother, the younger brother is able to maintain a minimum level of interaction with those around him.

Thus begins the youth camp featuring the beloved older brother and the easily isolated younger brother.

*U19 = Under 19 years old. *Libero = A position specialized in receiving (defense) rather than spiking (offense). Think of it as a role where height isn't strictly required!