The reporter Lady in chapter 21.
I DO NOT think that he did something, i believe that maybe she tried to by getting touchy. And Seunghyun just drank because his thoughts that whole day were only about Yuta. Sooo... And thats because Yuta could still smell the parfum.
But i am not sure. I have mixed feelings about Seunghyun still. He is a mystery to me... i don't know. This man is so exhausting... HOT but exhausting. I feel for Yuta

i really hope he didnt sleep with that woman or he'll lose my respect completely