Dangerous 'Junmen' is dangerous, because just like Joonmyeon, 'Junmen' is very much a Prince, gentleman, and.... dangerous.
"그럼 한국에 나랑 같이 가자. 나도 내년 한국에 돌아가니까. 비행기 표 두 개 살까?"
Oh, dangerous 'Junmen' is dangerous, everybody. Because he manages to make me call him 'Junmen' (and make me think about Joonmyeon every time I see him) even though I dislike Joonmyeon very much.