I kinda understand both parties. I mean, Tong Yang sees him as a friend so he thinks it's normal to ask and yes he wants to know more about A-Zhen. A-Zhen on the other hand doesn't see Tong Yang that way. He thinks they're not even close and he's the type that wouldn't speak out this kind of stuffs so he thinks he's nosy.
I feel bad for Tong Yang though because he comes to like A-Zhen (as a friend) because he thinks A-Zhen's being nice to him and wants to be his friend. For A-Zhen, up till now I still don't get why he has to tutor Tong Yang as he doesn't even want to become friends with him
It's non of their fault actually. Let's say it's Tong Yang's misunderstanding, he assumed that A-Zhen also wants to be his friend so he helped him study. He didn't expect to be brushed off like that so he's kinda hurt. That's why I feel bad for him.
Still, I couldn't blame A-Zhen for that as he never say anything about being friends with Tong Yang and he did tell him that they're just classmates.
I think Tong Yang's pissed isn't because A-Zhen doesn't want to tell him about his issues but because A-Zhen doesn't want to be friends with him.
The dude is nosy and can't respect privacy and when he got refused, he got angry. Like dude you should know your mistake...