Gekkouin Shiki

She is a genius at making machines and tools, and joined “OTL” so she could make interesting things. She and Mari are good friends and collaborate on development projects.

She is a beautiful, boyish girl, and with her knowledge of mechanical engineering and materials engineering, and her outstanding dexterity, she can produce anything requested of her.

As the protagonist consults with Shiki about prototype development and new products, they gradually become closer and closer.

One day, while the two are experimenting with a prototype of a “sex-sensitive zone-detecting robot,” the machine goes haywire, and the two find themselves in an erotic situation!

The main character is aroused by Shiki's sexy and rarely seen erotic side, and very quickly enters a sexual relationship with her.

Sexual experience: none