Seongnam finally gets to go to the amusement park. He's bummed that he can't talk to Sehyun, but he's also bummed that sia hasn't come to school to say she's sick. They've narrowed down the list of candidates to be the mom, and they've also narrowed it down to three: Yonhong, Yeonhong, and sia. Yonhong wants a blood test to see if he has a match for sehyun, and he also wants a genetic test report to prove that he has the right type of blood. .