tvN’s “Ghost Doctor” released a new making-of video! Helmed by “Heirs” director Boo Sung Chul, “Ghost Doctor” is a fantasy medical drama about two doctors who could not be more different in terms of their backgrounds, skills, or personalities, but who end up combining bodies and spirits. Rain stars as genius thoracic surgeon Cha Young Min, while Kim Bum plays silver-spoon resident Go Seung Tak. The new behind-the-scenes video begins with Rain leaning in close to Kim Bum. Rain confesses, “I have already kissed him inside my heart.” He continues to joke, “Even Uee said that my gaze when I look at Seung Tak is [more intense] than when I look at her.” The two fist bump, highlighting their great chemistry. While filming, Kim Bum gets a splinter in his finger. He states, “Leave it to professor Cha Young Min,” as Rain gets tweezers to take out the splinter. When he succeeds, Kim Bum compliments, “As expected of professor Cha Young Min!” When Uee sees Rain arrive on set, she accidentally calls him the director. Uee reveals that there was a similar incident in the past when she called him “teacher” as well. She explains, “It is because he is such a big senior to me.” Rain argues, “But we are friends,” and Uee replies, “I saw you at Dream Concert though.” Uee pretends to be hurt by Rain’s playful prank, and she asks the making-of camera to release the footage. EXID’s Hani joins the set to make her cameo, and the cast and staff cannot stop laughing at Rain’s acting. Hani’s younger brother Ahn Tae Hwan tells her, “The set is really fun.” While watching Rain act, Hani remarks, “He does something [funny], and then he tries to hold in his laughter.” Later, Ahn Tae Hwan sweetly brings a heat pack to Hani so that she can stay warm while filming. Apink’s Son Naeun gets mischievous by writing sticky notes such as “stupid” and “Young Min and Seung Tak” with a heart symbol between their names. She accidentally marks Kim Bum’s doctor gown, and the two tease the staff for getting flustered. When the staff members suddenly ask for Son Naeun’s signature, Kim Bum questions, “Is today your last day? Can you remove this mark before you go?” Another clip captures Uee teasing Rain for getting angry before he realized he was the one to have made a mistake. In between filming, Rain gets so goofy that Kim Bum tries to intervene and stop him. Before filming the final scene, Kim Bum remarks, “My hand is really big, but it looks small [next to yours].” Finally, the two high five after wrapping up filming. Watch the full making-of video below! “Ghost Doctor” airs every Monday and Tuesday at 10:30 p.m. KST. Watch full episodes episodes of the drama with English subtitles on Viki below: Watch Now How does this article make you feel?