The protagonist, Yuu Tono, is a second-year at Kazami Academy. He's at that age that falls right at the apex of one's youth and adolescence. But..."Youth? Who cares about that? I'm busy with my part-time job." He's a hyper-realist who devotes his youth to his part-time job. He adeptly completes his schoolwork while spending every day at work earning money. Hibiki, his childhood friend who refuses to stand by and watch and Riri, a classmate who looks up to Yuu as her master try to get him to join their clubs and change his life. Hibiki encourages him to join the "Activity Collective," or "AcTive" for short, made up of lively girls with the slogan, "Let's enjoy our youth and have tons of fun at school!" Riri encourages him to join the "Volunteer Collective," nicknamed the "NegaTive," made up of diligent girls with the slogan, "Let's devote our precious youths to making the world a better place." Both clubs relentlessly try to recruit Yuu. "I'm not interested in either. Youth isn't essential to me whatsoever." Day after day, the girls refuse to leave Yuu alone, without any concern for what he wants... Why in the world did things turn out this way? "That much oughta be obvious." "Get ready, Senpai. It's high time ya enjoyed your youth!" Just what kind of "youth" awaits Yuu Tono?!

The protagonist, Yuu Tono, is a second-year at Kazami Academy. He's at that age that falls right at the apex of one's youth and adolescence. But..."Youth? Who cares about that? I'm busy with my part-time job." He's a hyper-realist who devotes his youth to his part-time job. He adeptly completes his schoolwork while spending every day at work earning money. Hibiki, his childhood friend who refuses to stand by and watch and Riri, a classmate who looks up to Yuu as her master try to get him to join their clubs and change his life. Hibiki encourages him to join the "Activity Collective," or "AcTive" for short, made up of lively girls with the slogan, "Let's enjoy our youth and have tons of fun at school!" Riri encourages him to join the "Volunteer Collective," nicknamed the "NegaTive," made up of diligent girls with the slogan, "Let's devote our precious youths to making the world a better place." Both clubs relentlessly try to recruit Yuu. "I'm not interested in either. Youth isn't essential to me whatsoever." Day after day, the girls refuse to leave Yuu alone, without any concern for what he wants... Why in the world did things turn out this way? "That much oughta be obvious." "Get ready, Senpai. It's high time ya enjoyed your youth!" Just what kind of "youth" awaits Yuu Tono?!