Golden Prince and Argent King

After his mother's death, Yuuki discovers he is the illegitimate son of a wealthy businessman and is taken in by the Watase family. He must navigate a new life of privilege while adjusting to his two older half-brothers: the kind and outgoing Masumi, who is close to his age, and the stoic, workaholic Gai, who is several years older.

As Yuuki tries to find his place in this unfamiliar world, hidden feelings beyond simple brotherly affection begin to surface. Caught between the gentle warmth of Masumi and the cold demeanor of Gai, Yuuki struggles with confusion and angst, questioning whether such emotions can ever be accepted between half-brothers.