Another Child (2019)

An ordinary 17-year-old girl Joo-ri (KIM Hye-jun) finds out that her father (KIM Yoon-seok) is having an affair with the mother of her classmate Yoon-ah (PARK Se-jin). Joo-ri and Yoon-ah try to stop them from seeing each other but it only makes things worse. And to top it off, they discover that Yoon-ah's mother, a single mom, is pregnant. Soon, everyone involved are confronted by this circle of conflict and they must each struggle through their own growing pains.