Someone has framed you of cheating on Childe by editing a photo of you kissing another guy. Childe believed it and got hurt which ended your relationship with him

—

"what are you doing here?" Childe asked when he saw you infront of his front door. You're about to say something before you heard someone "love, who's there?". Your enemy emerge behind Childe snaking his waist. "Oh? Look at here the little slut." Your enemy said while grinning.