When you were young, did you ever play 'doctor' with your sisters or neighbors and touch each other's bodies? Do you remember that excitement? This young brother and sister aren't satisfied with just 'playing doctor'; they regularly engage in 'soapland games.' The sister, Shion, loves her big brother so much that she wants to have sex with him. She even sets up a makeshift soapland in her room. Opening for business late at night after their parents have gone to sleep, she offers an all-you-can-shoot course with every option included until morning. This is a forbidden tale of incestuous lust.
