Ninja Vixens: Forbidden Paradise (1999)

Mizuho Enomoto debuts as Myst, one of two beautiful ninja sisters who save Iyori, a young samurai on the run. Myst and Bell have a secret, though - one they'll do anything to protect! As they nurse Iyori back to health, love blossoms - not just between two of them, but between all three! But when Myst's mentor, the demon hag Ogen, shows up looking for a deadly revenge, their forbidden paradise could be shattered forever!