Brother's Lifelong Guard!

Shen Luo works as a taxi driver by day and a heroic masked vigilante by night. One day, he saves Fang Xue, one of a pair of sisters. Fang Xue asks him to rescue her older sister, Fang Qing. During this process, Shen Luo discovers that both sisters are actually the daughters of his former comrade. While the older sister secretly falls for him and the younger one idolizes him, he must decide how to choose.