Marie and Her Three Daddies

Episode 28 (1x28)

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Ki-sik becomes suspicious that Kang-se is secretly helping Poong-ju with their top secret test subject. Eun-kyung realizes that Suk-hee has a crush on Poong-ju and immediately begins plotting against her. Meanwhile, after accidentally eating Kang-se's sandwich, Do-ki panics about breaking his jinx and starts chasing Kang-se around, desperate to make it right.