FNS-001 - Sensitivity increases rapidly with 2-day intensive training! Nipple development hot spring trip, Erenku

Regarding sensitivity, Erenku's pink nipples are unknown. To permanently induce an erection of the protrusions resting on her F-cup breasts, a 2-day intensive nipple training hot spring trip is undertaken! Sensitivity-enhancing nipple stickers are applied in the car, and the now deeply colored nipples are playfully stimulated with an electric brush and nipple cups, and her white breasts are exposed in front of strangers. She jumps and reacts as they are pinched and licked, and when a penis is inserted deep into her vagina, she screams and thrashes wildly…