How many movies have Han Seok-bong and Joo Hyun-il collaborated on?

They have worked on 4 movies together! Their first movie together was Neotube: Threesome Restaurant (2020) while their highest rated movie together was Son's Girlfriend, Daddy's Girlfriend (2020). They have not worked together since Adult Toy: Can I Do It For You? (2021). They are most known for their romance films together.