Not long after he starts university, friendly, big-hearted Junpei runs into the very unfriendly Leo. As they speak, Junpei learns that they went to the same high school and that Leo was the "Demon Lion" feared back then as a secret gang leader. After those days spent as a lonely, misunderstood high schooler, Leo escaped to a faraway college to make new friends. Junpei becomes his first and vows to help Leo make more, but are his feelings for Leo stronger than friendship?