I feel like that's just what he thinks but when you get the flashback he bascially has the same feelings as his brother but chucks it up to it being " his twins feelings" influencing him but since we haven't gotten a real confirmation that's a thing it seems more like he stubbornly wanted to believe he didn't fall for him like his twin who was very obvious ( in his eyes) about how he felt for him.
I feel like the more current scenario where he acknowledges his feelings also had to do with ghe fact that he maybe for once felt the same way even though his twin wasn't there? ( Or maybe im wrong hahah)
That's the vibe in getting too, and it looks like he has been chasing Mc for quite a while like metaphorically speaking, becuz when he goes into heat Mc was like who are U chasing ?? Like deep down he likes Mc but doesn't want to act like his brother so he denied it by making it Iike he got influence by his brother when in reality he's just as down deep with his brother who's not afraid to show his affection towards mc unlike him
Just noticed but Zheng Yan didn't like the mc at first, and only fell for him later. I wonder what changed to make him fall in love with him