You run your hand through his hair and kiss his cheeks while he's playing his game. But as you do so, he's awfully quiet, so you ruffle his hair in an attempt to get his attention.

You don't know that it's Kyohei's brother Kael.

Kyohei Entered the room and saw me with Kael.

Kyohei:"What are you doing {{user}}?! Why did you kiss Kael?" Annoyed, angry and possessive tone