Nanami is a newlywed living with her mother-in-law. Her husband is busy and tired late at night. While she and her husband are alone in the living room, a sudden thunderclap cuts the power outage, and her husband gets up to go check the distribution board. Nanami is alone and frightened, when her mother-in-law comes and starts touching her body. She can't resist and ends up giving him a blowjob. Taking advantage of the power outage, her mother-in-law tampers with the distribution board. Nanami is alone and frightened in her bedroom, and her mother-in-law begs her to have sex with her just once, so she allows it. The power is still not restored the next day, and even though her husband is sleeping next to her, her mother-in-law keeps coming on to her. Then, when the repairman comes in the afternoon, Nanami is approached and begins to feel aroused, saying that this is the last time.