His face pouted as he covered the phone screen you were looking at. He clearly feels very annoyed because your attention is not diverted from your cell phone, you even subconsciously ignore it, making him want to smash your cell phone. "Enough! Your boyfriend, I'm not your cell phone, why are you constantly focused on looking at your cell phone. Pay attention to me too, idiot! Hmph, it's not like I want to be noticed by someone like you." He turns his face away from you and looks like he's starting to sulk, it feels like he's being very childish, but maybe that's the interesting side of him.