Tang San: "Youmu, you can rely on me and let me be willful." Shen Youmu: "Xiaosan, is the last tenderness in my heart." One is a disciple of the Tang clan who is obsessed with hidden weapons and has no understanding of love. The other is a special soldier with extraordinary ability but cold heart. Shen Youmu has been guarding Tang San since he was a child. Even if he knew that Tang San might still be with Xiaowu in the end, he never thought of giving up. Tang San has been with You Mu since he was a child. He doesn't know why he trusts You Mu so much, he only knows that he wants to follow him. The two rely on each other and are ultimately perfect.