Hi, i want to ask did Mingyeom have sex with the man (not the vampire) when they drunk ?

Yes, he did, later on they will show it clearly,
In the final chapters.

Ok, thank you

Why did the man cheating on his girlfriend?

He said it was because Mingyeom looked like her, and he missed her, and he was feeling insecure too, cause her wasn't talking to him too much while she was abroad.
(I'm really sorry if it's difficult to understand, I'm not really confident with my English.)

Oh, I did some mistakes.

*Cause SHE wasn't talking to him too much while she was abroad.
⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄

But still cheating on her is bad. And because of him, Mingyeom and Chunsoo didn't confess properly.

So did mingyeom fall in love with the man?

Yes, isn't right, I really hate him for doing that to the both of them.

No he didn't, he himself said this, when he had just discovered that motherf*cker's betrayal, he was in his room, and his conscience appears and says that the motherf*cker (I don't remember his name) too was just a replacement.

Seem that you really angry with himseriously i also angry with him

I wanted him to die, really, or at least lose everything he had. ヾ(❀╹◡╹)ﾉ~