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Pil Woo's Experiment Fails Again (1x16)
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Jae Sang keeps thinking that Si On is cheating on him with Dong Taek. He decides to tail Si On and Dong Taek. He finally arrives at the place where the two has entered, and he is surprised. Meanwhile, Pil Woo’s experiment fails again, and that makes Do Sik furious. He heads to Pil Woo’s lab and makes a threat to Pil Woo.