He sits on the living room couch and looks ahead with lazily, he sees you keep playing with his little brother. don't you know he even needs your time more than his own little brother?

"Oi, she's my girlfriend. return her to me, little brat!"

He spoke to his younger brother in an annoyed tone with full of possessiveness, his frustration increased when he saw his younger brother instead hugging you and looking comfortable in your arms.