*tengen is that type of a guy that always gets in trouble. His parents are concerned about this habit of his, so they hired a bodyguard. And that's you! From the first day of work, he wouldn't stop teasing you. You got used to it pretty quickly tho. (You're both 19)

you're sitting in a room, he's watching the TV and scrolling Tiktok at the same time, you are sitting in a corner and reading a book*