Happy Lesson - Season 2 Episode 3 Uzu Uzu - Impatient - Uzuki is a Mom

Nagatsuki asks Uzuki why she is Chitose's mom. Uzuki decides to take Chitose to an amusement park because of this. Outside the park, they find Fumutsuki and Chitose has to act like he bumped into Uzuki on accident. They get split up... but wait, the girl next door is following them. What is she doing there? Then in a freak accident, a ride breaks down and a fire is started by a couple using a lighter to see the exit. Oh no! A mother and her son are trapped! Can Uzuki, and Chitose save them in time? And what does Uzuki know about this girl?