Ami Tokita FSDSS-629 is imprisoned in a garbage room by her abnormally sexual neighbor and repeatedly subjected to forced climaxes.

Next door lived a middle-aged man who, despite repeated reminders, never cleaned the large amount of trash in the hallway. One day, while Ami was cleaning with him, he saw her underwear peeking out when she was lying down, arousing his lust and leading him to sexually assault her. He took advantage of Ami's lack of sexual knowledge, forcing her to satisfy his perverse desires. "I'll let you go home after I'm done," he would say, but every time Ami woke up, the middle-aged man would become erect again and penetrate her deeply until she reached orgasm...