i haven't read the novel but based on s1. it seems to be mutual attraction. they both are pretty attracted to each other both in appearance and sexual. weikun seems to be fascinated by yeehyeon's analytical skills and the fact that he painted his favourite painting. and as for yeehyeon, he finds liu handsome and kind.
obviously in the beginning weikun was a bit standoffish towards yeehyeon but as they got closer. he's been treating him and the people he cares with kindness. he seems to be extra nice to yeehyeon

Is it true that the ml only like mc cause he is after his ass? Like he is obessed with him but no sweet words? When does he fall for mc?