New to Seoul High School, Sehun is quick to befriend Luhan, one of the rising stars of the school's soccer team. When Luhan takes on the position of team captain, however, he leaves Sehun in favor of pursuing his new found popularity, and causes a rift to form between them.

Then one fateful night, Luhan causes a horrific accident he can never undo and to his horror, Sehun is the victim.

After ignoring then injuring Sehun, Luhan can only hope to try and make up for some of the damage dealt, but can the new memories they make together patch up Luhan's mistakes from the past?