After moving into a used condominium following her marriage, Mai Nanase's daily life was going smoothly, but she remained unfulfilled in her intimate time with her husband. Her neighbor, Kaneko, had been secretly watching her bedroom. Noticing her dissatisfaction, he lied to lure her to his place and forcefully pinned her down. Starting from her toes, he meticulously licked every inch of her body. Surprised and overwhelmed by the intense sensations in places she never knew were sensitive, Mai mentally vowed it was wrong, yet she gradually lost herself to his seductive touch. This new emotion begins to bring an unexpected change into her ordinary life.