Pressured by his family's background and expectations, high school student Hitonari Hiiragi has been considering quitting basketball. However, after meeting Akane Tachibana, Hiiragi's love for the sport is reignited. As he joins the Kouzu High School basketball club, Hiiragi aims to pursue his own path in basketball together with his cherished teammates. But despite having fun with his newfound comrades, Hiiragi eventually starts to question whether he can achieve his dreams with the current team and environment. As they each struggle with their differing approaches towards the sport, Hiiragi and the team ponder what it truly means to play basketball together.

I'll/CKBC has been dubbed in English by Bang Zoom! Entertainment and in French by Studio Chinkel.