From that day... it's been 10 years since I started to deal with my brother's sexual needs. A record of the growth of a sibling in a shut-in trash room and having sex with throbbing [brother and sister incest].

[More than a younger sister...Always friends...less than a lover] A strange relationship that he has been sexually dealing with for 10 years to his shut-in brother. "I'm not feeling gross...Onii is my hero," the little sister tries to comfort her when she sees her dark appearance, turning into a silly old man. One day, he accidentally saw his morning erection and was found out, and he was forced to "Stroke me with your hands," and he couldn't refuse and ended up doing it. From then on, the demand escalates and the moment it crosses the line...the dirty room becomes a secret base for the two of them...