That's what I was thinking. The whole episode all he did was just thinking how namers are same as other humans like I get it the first time you said it man
Why are you yapping in your head, at least take a bite of your food
there isn't a specific chapter that shows he tian leaving but its always been implied in many previous chapters that he leaves at one point (maybe after high school??)
Its been 8 yrs and ive still not read a good dark psychological bl like this till date.