Yesung hates being told that he's liked too much. Eunhyuk likes saying what he really feels.  Yesung dislikes the idea of being teased at. Eunhyuk likes showing how he really feels. Eunhyuk likes Yesung, Yesung... will come to like Eunhyuk?! nah...

Yesung doesn’t like it, the fact that they are both men and even if society is open about it and found Eunhyuk’s behavior towards him amusing.

“Stop staring at me!” Eunhyuk exclaimed when his and Yesung’s eyes met for just a second.

“Since when have I been staring at you?”

“Stop staring, you can’t get me through that, that’s useless because I’ve already been yours to begin with.”