Bullied

Duan Tianyang watched as the backs of the bullies disappeared after they ran away thinking that there was a demon in the Mirror Lake and it was what attacked their group. As for Duan Tianyang that was left and didn't run away with them? As if they care about him! Instead, they even wished that the demon would kill the 'orphan', which could also buy them some time to escape. 

Or, if Duan Tianyang ran away with them to escape, they would have even blocked Duan Tianyang or pushed him away to not escape with them. Either way, they wanted him to be harmed. Thus, Duan Tianyang didn't bother to run away with them, despite that there was really a demon here. 

Also… Duan Tianyang lowered his head as he now felt the presence of the person on the roof.