My neighbor, Yuuki, smoking a cigarette in the hallway of my apartment, is a single mother with a small boy. Whenever we passed each other, her flashy tattoos from her chest to her shoulders caught my eye, and I was prepared for her to be scary, but as we talked, I was touched by her kindness and cuteness, and we quickly became closer and attracted to each other. Her firm body and clear white skin, combined with the vivid tattoos, made her even more alluring, and I gave in to my rising desire and became immersed in sex with her. I thought my life would continue like this, drowning in the charms of Yuuki, who seems to have a dark past...