Mei is the older sister who lost her parents when she was little and raised her younger brother as a substitute for her mother. My younger brother grew up to become a young man who loved his sister. He was able to safely enter university, and his younger brother lives in his university dormitory, and his older sister stays at his parents' house and works in his hometown. Mei panicks as her younger brother returns home for the first time in a while. "Sorry, I only have one futon tonight... are you okay? 'A single senbei futon reminds me of the past. It smells nearby. Hearing heartbeat. Ah, it's impossible... I'm so horny for my sister. Don't say anything awful, just the tip. Forbidden incest that connects to the roots. A G-cup titjob that engulfs the hustle and bustle of the city. A vacuum blowjob that sucks in even the hard work. Hey, you like it the best in the world, right? Children... can you have one? An immoral, impure love affair that is immersed in intense insemination sex.
