How many movies have Kazuya Ooi and Nagai Seiichi acted in together?

They have worked on 1 movie together! Their first movie together was 「Daoko A(nima) HAPPY NEW TOUR 2021」 (2021) and was their highest rated movie together. They have not worked together since 「Daoko A(nima) HAPPY NEW TOUR 2021」 (2021).