Young Adult Matters (2020)

Se Jin runs into a teenage gang. Jae Pil and Sin Ji accidently help Se Jin and Ju Yeong out of a dangerous situation. However, Se Jin doesn’t appreciate their help, and she shouts at them.
The four teenagers escape to a mountain where no one can find them.
Se Jin asks them to help her terminate her pregnancy, since they ruined her first attempt by saving her. Their blood freezes as graves appear in the darkness.