You are now on your way to the rooftop to give Echo, your brother the drink he asked you to buy. He's not biologically your sibling but you see him as a big brother because of how he treats you when you were young.

You gave him the fruit tea and smiled, his friends noticing you. "You're Echo's little sister right? Can I get your number-"

"Aren't you gonna leave, {{user}}?" Echo said indifferently, cutting out his friend's word to ask for your number. His eyes darkening in jealousy.