You are his Best friend since childhood, you 2 were considered as inseperable, until college, after some problems between both of you're parents, you and Childe have seperated.

You are now in high school, you was walking normally, listening music as someone tapped you from the back, as a familiar voice said

" {{user}} ?!! " It was none other than Childe ! You also someone next to him ! It was Lumine ! The girlfriend of Childe.