
Bruh the author could have made him in love with Ren and chose to rape him so that he could tie Ren down. Or they could have been lovers. Anything would have been better.
Why the fuck would you use a baby as a device to get the two together? You gave birth to a baby without caring about it one bit?
This had so much potential until this chapter. Why did the editor green light this bs?

Most of the hints are in Christmas special chapters, when Tian just came back to the country.
1. In the first Christmas special, Mo is seen smoking a cig. It's clear that he isn't used to smoking because one, we have never seen him smoke before, and since that chapter, we have never seen him smoke again. Two, he immediately coughs after taking a hit. It's my own speculation, but I think it's likely that he smokes when he misses He Tian too much.
2. In a drunken stupor, Mo asks if Tian is back yet, not realizing that Tian is right next to him. That question is always on his mind.
3. He breaks down in tears when He Tian admits that he comes back because he misses Mo too much.
4. Mo immediately searched for He Tian upon waking up. When he called out for Tian, ithe author didn't end it with a question mark but rather a "...." I think he was scared that Tian abandoned him again.
5. And now this. We clearly see that Mo tries to move on with his life after Tian cuts off contact with him. Yet he still keeps all the mementos and looks at it once in a while when his yearning for Tian becomes uncontrollable.

He left at around 15. Now they are supposed to be out of college soon (22), given that Xixi is applying for jobs. Mo waited and waited without knowing when or whether he will be back.
He taped out Tian's face but never scribbled over it so that he could still look at Tian's face when he missed him too much. The box was taped up over and over again, showing that he did indeed open and tape it up multiple times.
Tian's face twisted in agony upon realizing how much he hurt Mo though ┗( T﹏T )┛

It was implied in the Christmas chapter when He Tian comes back and Mo is drunk saying that Tian just disappeared
https://www.mangago.zone/read-manga/19_days/bt/br_chapter-134197/pg-1/

Good catch but it was a mistranslation. The raws says “中学” which is middle school. So far we have no evidence that Tian stayed until high school.
Now of course Tian might have left during high school, but the chapters prior to the time skip were already alluding to Tian’s school transfer, so I’m assuming this is when he left for a long period of time.
rider and miria should just get married at this point and adopt Mori as their baby fr.
Rider and Mori's connection will always be special though, even thoguh Miria is adorb and nice af.