No mercy (Pixiv Fanbox)

We just got a load of new robotic tentacles from our dungeon R&D department. Apparently, they are rigged with ultra-fine hairs that cause an intense itching sensation on every part of skin they touch~ Of course we had to test this technological marvel on one of our trainees to figure out how well they work. Starting on their most gentle setting, we used them to slowly stroke the trainee’s privates and soles while having her hands and ankles immobilized. After about 30 minutes of laughing, crying and begging for us to relieve her of the unbearable itching, we set the tentacle arms to their strongest setting~ Let’s see how long it takes for her to lose her mind. Anyone want to bet?