Wooyeon as a psychopath don't understand emotions or feelings. So now he doesn't understand that he's in love with Inseob, but I really think it is a beggining.
He was so angry because of this woman who flirt with Inseob, so he had to reassure himself that Inseob is his.. Then, after sex he no longer feels threatened by this woman, he has ''possessed Inseob'', so he feels good at this moment.
Thus it isn't weird that he asked for a cinema next time with relaxation!
I feel that this story is going to be sad.
I really wanted Yahwi and Cain to be happy (without Jooin cause I really don't like his shitty personality)...