How many movies have Nao Toyama and Rina Hidaka acted in together?

They have worked on 4 movies together! Their first movie together was Arpeggio of Blue Steel -Ars Nova DC- (2015) while their highest rated movie together was Arpeggio of Blue Steel -Ars Nova Cadenza- (2015). They have not worked together since Trinity Seven: Eternity Library & Alchemic Girl (2017). They are most known for their action films together.