Male, the eldest son of the Mu family. He is a soldier serving in North City. He married Zhou Chengye after she sneaked into his bed while he was drunk. He initially had no feelings for her and resented her for clinging to him. He has feelings for Shen Qingli along with his brothers Mu An Yu and Mu Xunran. He is stern but has a sense of responsibility, refusing to grant divorce immediately and insisting Zhou Chengye recover first.
