My girlfriend and I have been living together in Tokyo for four years. She has no intention of getting married. She always works the night shift and comes back to sleep in the morning, so I haven't had sex with her in three months. The university entrance exam is coming up, Adachi Yuri, my girlfriend's younger sister, came to Tokyo to take the exam, so she stayed at my house for a day.

She is really beautiful, and she wasn't wearing a bra, so when she looked at me, my little guy automatically stood up.

When we were both in the bathroom, there was suddenly an earthquake. My little guy and I were so close together that she realized my little guy was pointing straight at her.

And from then on, she started to seduce me, making me ejaculate continuously inside her. I knew she liked me. Every time I talked about buying a house with my girlfriend, she would sulk....