How many movies have Suisei Akai and Tadai Mahiro collaborated on?

They have worked on 1 movie together! Their first movie together was STARS-118 One Day And Two Nights, Yari Wants To Squirt All-you-can-eat Hot Spring Trip Mahiro Yui (2019) and was their highest rated movie together. They have not worked together since STARS-118 One Day And Two Nights, Yari Wants To Squirt All-you-can-eat Hot Spring Trip Mahiro Yui (2019).