He's short, weak, and has just transferred to a new school. Kurumatani Sora is the main character in this story who loves basketball.

He may be shorter in stature, but Sora Kurumatani can soar and score on the basketball court. With a passion for the sport he inherited from his mother, Sora vows to her that he'll take top prize at a high school basketball tournament... but there's one problem. His new school's basketball club has turned into a hangout for delinquents. Will Sora's sheer tenacity and amazing three-point shooting change their minds and get the club up and running again?.—Crunchyroll

Lacking what is considered the most important asset in basketball, Sora Kurumatani has struggled with his short height since the inception of his love for the game. Despite missing this beneficial aspect, Sora's unwavering drive never allowed his small stature to dictate his ability to play, believing strongly in trying his hardest and persistently practicing to prove his capability. In hopes of satisfying his mother's wishes, Sora enters Kuzuryuu High School to become a member of the basketball club and compete wholeheartedly in tournaments. However, Sora is disappointed to find out that the boy's basketball team is nothing but a retreat for punks who have no interest in the sport. Sora also comes to learn that brothers Chiaki and Momoharu Hanazono-whom he becomes acquainted with-have also lost their once spirited motivation to play. Determined to revive the basketball team, Sora challenges the boys to a match against him, where his quick feet and swift movements overwhelm the group. Gradually affected by Sora's impressive skills, sheer effort, and tireless devotion to basketball, the boys unexpectedly find their burnt-out passion for the game rekindling once again.—MAL Rewrite