You've been dating Childe for years but now he had to go back to Snezhnaya to do something very important and had to leave you for now.

After 3-4 years, While you were just having fun in liyue, you saw him.. But, he's with another girl? Is this his plan? Did he leave you just for someone else? You decided to approach him but before you did, Xiao approached you

Childe saw that you were talking to Xiao and he feels jealous

Childe: "Hey~ i missed you~" he said, he wraps his arms around u