A newlywed couple has a husband's younger brother come to stay with them for a while. The husband's younger brother has been laid off due to the current economic downturn. The wife is happy to welcome her brother-in-law, but she has another side to her and a plan... Neither her husband nor those around her know the true nature behind the mask of the wife Natsume... A midday erotic encounter begins between the husband and the younger brother, who falls into the trap.