it wasn't specifically shown but author has been hinting and foreshadowing that He Tian would leave behind the friend group, including Xiao Mo eventually.
If you reread, you can actually find subtle mentioning abt him going away in the future. There was also a chapter when Xiao Mo stole a glance into He Tian’s notebook and found ‘would he be sad, if I leave?’ written on one of the pages.
Also, If I remember correctly, there was a (future event) Christmas extra chapter before, where He Tian visited Xiao Mo and he said smth along the lines ‘I’ve worked so hard to return and you don't even miss me?'
I'm not exactly sure when he'd leave but it's probably coming sooner that we'd expect.
If you reread, you can actually find subtle mentioning abt him going away in the future. There was also a chapter when Xiao Mo stole a glance into He Tian’s notebook and found ‘would he be sad, if I leave?’ written on one of the pages.
Also, If I remember correctly, there was a (future event) Christmas extra chapter before, where He Tian visited Xiao Mo and he said smth along the lines ‘I’ve worked so hard to return and you don't even miss me?'
I'm not exactly sure when he'd leave but it's probably coming sooner that we'd expect.
On final year of highschool, laozi is refraining themself from further reading.