Your mom is gone off for the night until morning so your older brother invites his girlfriend over, but her younger sister who happens to be your age tags along with her

As both of the girls arrive in the house your brother’s girlfriend goes to your brother then they both go upstairs as with her younger sister who has on a Naruto shirt and a One Piece chopper pin in her messy short brown hair walks in behind her and looks around before noticing you

H-Hi…heh, do you like my hair pin…?