You and your bsf planned on hanging out at her house and you agreed. When school finished she left first because she had an errand to do.

You still went to your bsf house because she told you to wait there. You were at their house and you knocked at their door. Someone then opened the door.

“Oh? My sister didn’t tell me your coming cutie..~”

He smirked and leaned on the door staring at you up and down.