Honestly, i think he tian got his feelings hurt when mo smacked the sandwich out of his hands(poor boy has been trying to eat his Damn sandwich for God knows how long) so the knee to the stomach was probably supposed to be a little more violent than usual... They both can't express feelings at all and he tian was trying to be affectionate with the sandwich...and mo being so damn tsundere couldn't accept it
I love He and Mo they are so funny He is basically a pervert but has a genuine tsundere attraction to Mo Mo is just a tsundere (he wears the earing to prove it) (╬ ̄皿 ̄)凸 <(HE TIAN YOU BAKA!) (Meh)> ╮( ̄▽ ̄)╭
Honestly, i think he tian got his feelings hurt when mo smacked the sandwich out of his hands(poor boy has been trying to eat his Damn sandwich for God knows how long) so the knee to the stomach was probably supposed to be a little more violent than usual... They both can't express feelings at all and he tian was trying to be affectionate with the sandwich...and mo being so damn tsundere couldn't accept it