Living in adjacent apartments, the sisters Ayumi & Erika remain close even after marriage. While their sisterly bond is strong, their marital relationships are not. Ayumi has been discussing an early divorce with her husband Tetsuya, wanting to live with Erika alone. One day... Tetsuya, who wanted a child, inserts his penis into Ayumi and ejaculates inside her. 'If I get pregnant with this man's child, I won't be able to divorce him!!' Just as the sperm was about to implant in Ayumi's vagina, Erika enters the bedroom...
