
He seems frustrated and sensitive atm, he might be seeing him and LiHuan in those two, as redhead being the "straight" guy, maybe that's what he wants to say to LiHuan, that he's hurting because he's scared of being an experiment or later exchanged for a girl (but if he does say it and LiHuan really leaves he'll be even more hurt, even tho he's already rejected him) and it's easier to blow up on someone who he doesn't have a good opinion on (who also happens to be "straight") and that he doesn't know, and well Pan is understanding
Maybe

Ooh that's a good point. I had also been thinking that YuYang is painfully aware of how harsh relationships of any kind (i.e. family, acquaintances, romantic) can be if you're gay. While for himself he puts on a calm facade, he'll get riled up at the idea of someone he cares about (and who has probably been one of his own supports) unnecessarily experiencing hurt. We know that YuYang is far more sensitive than he lets on.
I know he likes Pan as a friend, but normally you just pull a friend aside and say quietly, watch out for this guy, he's a player... not get all angry and confrontational? It might be something to move the plot along. Also, Pan's apartment shelves are super empty, I was distracted noticing that.... but I liked the chapter. Thank you for updating, Cappy!