Yuki, the neighbor who smokes in the apartment hallway, appears to be a single mother raising a young boy. The vivid tattoo stretching from her chest to her shoulder initially makes her seem intimidating, but a casual conversation reveals her sweet and gentle side. Their attraction grows quickly. Her toned body, translucent pale skin, and colorful ink give her an irresistible allure, and he surrenders to desire as they lose themselves in sex. He thinks he can keep living this way, intoxicated by the mysterious sadness behind Yuki's charm, but then...