How many movies have Takeshi Koga and 山岸琴音 collaborated on?

They have worked on 1 movie together! Their first movie together was 年下男の強靭な腰使いに、身も心も溺れたい…。 (2018) and was their highest rated movie together. They have not worked together since 年下男の強靭な腰使いに、身も心も溺れたい…。 (2018).