Koakuma devi: Torokeyu ana nozoki

Original title: 小悪魔デヴィ とろけ湯穴覗き

Shoko is a sex worker who travels the country, known as "Shoko of Ecstasy" for her exceptional sexual prowess and technique. Completely alone in the world, she returns to her hometown after several years to visit her mother's grave. On her way back, she saves a man attempting to jump off a bridge—it turns out to be Koichi, a childhood friend and her first love. He runs the hot spring inn inherited from his late parents, but business has slumped, and real estate developers are eyeing the land...