Seongseureopgo Janinhan

N the outside, Sung-Hyuk appears to be a naturally gifted, alpha. Everyone envies him, but deep down, he harbors a profound loneliness. His parents despise him, and his stepbrother, Yu-In, exploits his weakness as a child and a younger brother, treating him like a toy. One day, when he realizes something is wrong with his body, Sung-Hyuk's life is turned upside down. Without time to adjust to his loss of status as an alpha, he falls helplessly to his stepbrother's schemes.. (Source: Ridibooks, translated)