How many movies have Mayu Satomi and Mototsugu Watanabe collaborated on?

They have worked on 2 movies together! Their first movie together was Monde monyû-mu: Moe musume makai e iku (2017) while their highest rated movie together was Beautiful Breasts Serenade: Erotic Fair Skin (2020). They have not worked together since Beautiful Breasts Serenade: Erotic Fair Skin (2020).