SBSs Nobody Knows has released a new making-of video!The behind-the-scenes video showcases Kim Seo Hyungs playful nature as she films for the drama. While discussing with the director about how to film the next scene, the actress suddenly starts singing Yang Joon Ils Ga Na Da Ra Ma Ba Sa. Ryu Deok Hwan wittily follows along, and the director asks Kim Seo Hyung if she sang that on Lee Dong Wooks talk show Because I Want to Talk. She admits she did, and the director excitedly vows to watch that episode.In the middle of discussing a serious scene, Kim Seo Hyung suddenly bursts into laughter. Her laughing doesnt cease even at the next filming site, and she scolds herself for not being able to control her laughter. Despite her complaint, she continues to joke around with Ryu Deok Hwan. She suddenly brings up she wants to eat chicken. Ryu Deok Hwan agrees, and Kim Seo Hyung asks him to buy chicken for her.Before filming, Park Hoon jokes around with Ahn Ji Ho to relax him. Park Hoon bends down close to Ahn Ji Hos face, and Ahn Ji Ho laughs as he comments, I feel like Im going to gain consciousness [because of you]. Then Park Hoon jokes, Im going to see how different your acting is. [Your expression when youre lying down] must be different. In full detail. Isnt that what detail is all about?Watch the full making-of video below!Watch the latest episode of Nobody Knows:Watch Now