He traveled to another world and became a baby. Before enjoying the favor of his relatives, he was taken to the valley by his master to practice. What is the secret behind his hidden second personality and the tracking of a mysterious man? After returning, a half-mask conceals his peerless appearance, but cannot hide his world-famous elegance. However, many handsome men fall in love with their "brother". Should this love that is at a loss for them be continued or buried quietly?