Yeon was offered to play the male lead in the new JTBC series Thirty-Nine according to media outlets. If he joins the production, he will be working with Son Ye Jin, Jeon Mi Do, and Ahn Sohee. Thirty-Nine tells the romance and everyday lives of three friends who are on the verge of turning 40. Lotte Culture Works will be producing this new 12-part series. Encounter screenwriter Yoo Young Ah pens the script, while Run On co-director Kim Sang Ho helms the production. Yeon is currently starring in JTBCŌĆÖs Undercover as the younger days of Han Jung Hyun, a former agent at the Agency for National Security Planning. Thirty-Nine will begin filming in the latter half of this year, and the premiere date is yet to be decided. ┬Ā Source (1)