How to Be Thirty: Cast How to Be Thirty Comedy, Drama, Romance 2/23/21 https://tv.kakao.com/channel/3754840/cliplink/416522391?metaObjectType=Channel GeneralEpisodesTranslationsCastCharactersGallery Cast See full cast → Kang Min Hyuk as Lee Seung Yoo Song Jae Rim as Cha Do Hoon Baek Sung Chul as Hyung Joon Yoong Jung In Sun as Seo Ji Won Hani as Lee Ran Joo Cha Min Ji as Hong Ah Young