beta
Maybe spoiler, so beware...
After reading the first chp of season two in KR I think there was a mistranslation in the official EN where Hwibum is talking to his friend about Yeonwoo.
Because the EN makes it seem like Hwibum told his friend he was seeing a guy, but based on the 2nd season he either said it was a girl or his friend assumed it was. Because the friend definitely has no clue coming in that they are dating or that Hwibum is at all into guys.