Mei, the older sister, lost both parents at a young age and raised her younger brother as a surrogate mother. Her younger brother grew into a young man who adored his older sister. He successfully made it into university, living in the dorms while his older sister stayed behind to work in the local area. Her younger brother's long-awaited return home sends Mei into a panic. "Sorry, we only have one futon tonight... is it okay?" The single rice cracker futon brings back memories. The scent of her nearby nape. Her heartbeat. Oh, I can't take it anymore... I'm aroused by my sister. Don't say such cruel things, just the tip. Forbidden incest that connects all the way to the root. A G-cup titjob that engulfs the hustle and bustle of the city. A vacuum blowjob that sucks up even hardship. Hey, I love you more than anything in the world. Shall we have a baby? A tacky, impure love affair immersed in intense, impregnating sex.