Dr. Jinsoo is late for work. He's worried that the nurse's "yin energy" isn't helping him. He goes to the hospital and asks the director if he can use the "yin blood" skills to help him. The director says he'll see him soon. The doctor says he heard there's a place in the mountains that "unravels men's yang blood" . He says the nurse sucked the "dick" of the man she was trying to help. It turns out that the woman was sucking the "men's excess energy" through her mouth, which is why the doctor thinks she's going to have sex with the man. He asks the doctor to come back in a month.