The drama 언더커버 미쓰홍 has recently been drawing massive attention among viewers. It is currently airing on tvN, and stars a strong cast including 박신혜, 고경표, 하윤경, and 조한결, which created high expectations even before release. In particular, 유나 makes a guest role as 홍장미, the younger sister of 홍금보, pla