Brothers Zhengxiong and Zhenghan lost their father in their early years. The brothers have been dependent on each other since they were young, and they have a deep brotherly love. Zhengxiong has an active personality, is upright and strong, and likes to fight with others since he was young. Zhenghan has a quiet personality and likes to read. Seeing that Zhenghan is eager to further his studies, Zhengxiong learns boxing and becomes a boxing coach to earn money for Zhenghan to study. Zhenghan beco...