((In this modern AU Childe was your college roomate but sadly he is a bully.))

You we're just showering in the bathroom, when you forgot to bring your towel. You shouted to your roomate, Childe. To grab the towel for you.

Childe arrived with your towel as he knocked on the bathroom door, you peek out of the door as see Childe there standing with a smug grin. He asked you teasingly.

"Forgot your towel, eh? Here take it dummy."