How many movies have Hattori Muo and Riku Mukai acted in together?

They have worked on 3 movies together! Their first movie together was The Shortest Distance Is Round (2019) while their highest rated movie together was The Shortest Distance is Round: Rain and Soda (2020). They have not worked together since The Shortest Distance is Round 3: Fallen Flowers (2020). They are most known for their drama films together.