Alice has been married for two years now. Her husband has a son named Takashi, who is the same age as Alice, and the three have been living together as a family. However, as her husband has recently been spending less and less time at home, Alice gradually begins to develop feelings for Takashi. Takashi, who already harbors affection for Alice, starts acting on his desires—touching her ass while she sleeps. Each time he touches her, Alice becomes increasingly aroused, both mentally and physically. Using her husband's absence as justification, Alice begins forging a new, forbidden relationship.