He Yiquan and He Yichun are half-brothers. Their parents got married when they were in elementary school. So they became a family. Yi Chun is two years older than Yi Quan, but Yi Quan has never called Yi Chun brother, and always has a cold attitude towards Yi Chun. So Yi Chun always felt that Yi Quan didn't like him very much. Although he is always cold towards Yi Chun, Yi Quan always steps forward to protect Yi Chun when he is in trouble...