I totally see where you're coming from, but Mo cares a lot about he tian. In the beginning He Tian got himself involved in Mo's problems (when he is about to be kicked out of school)and solved it for him. Mo also seeked out He Tian when white hair started harassing Mo. So Mo knows he can really count on He Tian. Mo's personality is very tsundere, so he talks alot of shit about wanting to not involve himself with their group, but that because he previously hung out with assholes who used him. So you can interpret his actions as someone so new to the concept of friendship.Mo wants to be alone because thats all he knows, its his comfort zone, but He Tian drags him into their shenanigans, creating Mo a normal highschooler's life. E.g. camping, making a band, hanging over at a friend's place, coming over to his house, gifting him something (earrings). Mo is super uncomfortable because he isn't used it. I won't deny it that He Tian doesn't have ulterior motives, he like Mo a little too much, and he is slowly trying to get Mo used to skinship. They are both tenneagers and I'll say that He Tian is forceful. But He Tian doesn't reallyknow how to care for people or show love properly either. If you recall, he loved his puppy, but it was 'killed' because he show too much affection towards it. Anyway, Mo is beginning to reciprocate.. slowly but surely. Readers cheer for them because they both have hardy exteriors but they're both mushy inside. For example, Mo was so worried when he heard that He Tian was injured. He shows his affection ever so subtly when taking care of him, and He Tian wanted it all (hence why he told the helicopter to go away)

Honestly, I don't get the people who are rooting for He Tian and little Mo... so far Mo has been unwilling all along... what? is He Tian going to win him over by wearing him up...
I don't see any fluff... any romance... just constant sexual harassment.
Even though it is supposed to be funny (and it is) this is just too much... ^^'
That's why I prefer the other couple. :pp