How many movies have Eiji Wakamatsu and To Nguyen Ngoc Huyen collaborated on?

They have worked on 2 movies together! Their first movie together was City Hunter: Shinjuku Private Eyes (2019) while their highest rated movie together was Is It Wrong to Try to Pick Up Girls in a Dungeon?: Arrow of the Orion (2019). They have not worked together since Is It Wrong to Try to Pick Up Girls in a Dungeon?: Arrow of the Orion (2019).