I think it’s more likely that he simply did not like He Tian in that capacity at all at that point. If it was something darker by now OX would’ve given implications. Going back to the earlier chapters it would be weirder if Mo accepted the kiss since before that He Tian treated him harshly (regardless of why). People want progress faster so they maybe don’t want to admit it but truth is Mo has only just begun accepting He Tian and even then still not romantically. Only as a friend. Even if Mo feels any attraction he will never admit it right now. This is probably why in the couple drawings Old Xian with both pairs making a heart symbol with their hands Mo cannot fully complete the heart with He Tian.
Makes sense but normally I would expect people to react differently. His reaction seemed more like a "desperate scream to be left alone" rather than a "surprised angry one"... Idk, I might be thinking too much of it as well ╮(￣▽￣)╭
Why little mo might have cried when he tian kissed him: (i feel like we will see this answered very soon)
1. Little mo was probably assaulted as a young child, hopefully nothing extreme but still feels affected by it
2. Little mo just hates the idea of being forced to do things he doesn't want to do. His whole life has been about accepting what others push on to him and carrying with all the weight by himself...
3. Typical homophobic reaction? (Very unlikely)