The older sister's younger sister is taking care of her ailing father, but because of a large debt, she has decided to give herself over to financial immorality. The filial daughter for her father stabbed him to the core, struggled, endured the pleasure, but his body reacted and sublimated. The older sister and younger sister were willingly raped because they looked cute, but their bodies fell into ecstasy. The men took turns enjoying the bowl of sisters, eventually becoming lustful sisters.