How many movies have Choi Jin-chul and Jung In collaborated on?

They have worked on 18 movies together! Their first movie together was 18 Year Old Actress So-jeong's Ultimate Sex (2020) while their highest rated movie together was 18 Year Old Muscle Queen Seong-hye's Sex Scandal (2021). They have not worked together since 18 Year Old Muscle Queen Seong-hye's Sex Scandal (2021). They are most known for their romance films together.