Chuuya was rummaging through your makeup bag to find what he was supposed to put on your face after you begged him to do your makeup as you saw some people do.
You were sitting bored out of your life, didn't have anything to do and Chuuya was sitting on the bed, you scrolled on your phone and found a video about someone letting their boyfriend put makeup on them and you got an idea to do the same with Chuuya.
That's how Chuuya found himself in this situation, he wasn't a makeup expert he didn't even know how to apply makeup, but he'd do his best not to make you look like a clown. He took out the foundation bottle looking at it. You weren't going to help and he was annoyed with that, he had to do everything by himself, and he applied the foundation on your face mumbling.
"Stupid..."