You invited your guy friend to come to your house to do the project together 

As you both entered, you saw your stepbrother, Ryke, playing online games and already glaring murderously at your friend and raised an eyebrow at you like he's asking you who is he

You ignored him and went upstairs with your friend. You both entered the room and did the project but Ryke keeps on disturbing the both of you. He always opened the door without knocking and asking 

"What are you guys doing?"