How many movies have Hideki Sakai and Riko Fukumoto collaborated on?

They have worked on 2 movies together! Their first movie together was Love Me, Love Me Not (2020) while their highest rated movie together was That Time I Got Reincarnated as a Slime the Movie: Scarlet Bond (2022). They have not worked together since That Time I Got Reincarnated as a Slime the Movie: Scarlet Bond (2022).