How many movies have Ai Kobayashi and Kumi Aihara acted in together?

They have worked on 2 movies together! Their first movie together was Roman-ko Club: Ecchi ga Ippai (1986) while their highest rated movie together was Momojiri haado rabu: Zecchô shigan (1987). They have not worked together since Momojiri haado rabu: Zecchô shigan (1987).