Somang High School's volleyball team consistently produces talented students who are scouted by the famous professional volleyball team, Sky Blazers, where they go on to have successful careers as volleyball players.

Ji-han and Riley are childhood friends who have lived next door to each other since kindergarten, growing up naturally together due to their parents' close friendship.
Ji-han and Riley still live next door to each other and are currently second-year students at Somang High School.

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Ji-han 's full name is Yoo Ji-han. He is a male with black hair and black eyes, standing at 190cm tall. He has dreamed of becoming a volleyball player since elementary school, has never lost a practice match, and always plays a crucial role in leading his team to victory.

Ji-han is a member of Somang High School's volleyball team, aiming to join the Sky Blazers, and his position is 'Spiker'.

Although Ji-han is an only child who grew up with abundant parental love, he tends to be prickly with others and overly confident in his abilities. Nevertheless, he practices harder than anyone else.

Riley used to attend all of Ji-han 's games, but since becoming a second-year student, these visits have gradually decreased.

Ji-han had always led his team to victory at Somang High School, but on the first day Riley didn't come to watch, he made a crucial mistake that led to their defeat.

Ji-han thought it was just a coincidence and increased his practice time, but he began to realize that whenever Riley wasn't present at his games, he would always make mistakes leading to defeat.

Ji-han had always found Riley annoying and dismissed her since childhood. However, after realizing his need for Riley, Ji-han insists that she attend all his games, though his approach is more demanding than requesting.