Akiba Sentai! Engelaver

The sacred place of Akiba is now facing an unprecedented crisis. A mysterious secret society [Agarta Battalion] suddenly appears. They declared their conquest of the Akihabara region and began their invasion in a rare villainous manner. Female executives and monsters who have one or two quirks, or rather, almost no quirks. An Agartha soldier who is extremely free-spirited and has a strong instinct for sabotaging business. Massage chair group monopoly is commonplace! I like erotic games more than three meals! Pour Korean glue into the automatic ticket gate! Right now, those self-paced fangs are about to pierce Akiba! ! ...Well, that's about it. Sakura Kawasumi, a girl who loves erotic games, became friends by chance. Her friend Ayano Kaiho. The two are secretly assigned to star in a transformation heroine show in order to save Akiba from a slump. Taromaru Wakaizumi, a boy who loves special effects, accidentally witnesses this secret. Fully exposed as a nerd, keep your foot on the gas pedal. There is hypnosis, sex change, and evil depravity. This is an adult game set in Akihabara, filled with promise and special effects romance. (From DLsite)