Rei Aoki, the housewife living in the apartment complex, was known for her earnest and friendly nature, earning trust and respect from her neighbors. However, one day she could no longer hold her bladder and ended up wetting herself. This embarrassing moment was witnessed by Takamine, another resident, marking the beginning of her torment. Takamine begins blackmailing Rei, forcing her into degrading acts. Under intense psychological pressure, she reluctantly obeys his demands. A few days later, other residents get involved and she is coerced into wetting herself in front of everyone. Though resisting at first, Rei ultimately gives in and urinates herself, and in the depths of her humiliation, she unexpectedly begins to feel pleasure. This shift within her becomes the key to the story.