25x3 - Kamen Rider

Shinnosuke and Kiriko are sent to investigate an art gallery where there have been rumors of women's ghosts being eaten by a monster, but when they arrive they find the owner Asaya refuting the rumors while asking Kiriko to model for him. While suspicious of Asaya, Shinnosuke investigates the gallery, only to be hit by the "Heaviness" and the appearance of a Roidmude targeting Kiriko.