After falling in love and getting married, after five years of married life, the relationship became stale and turned into a sexless marriage. Jun, a plain and serious husband, was rejected by his wife for sexual intercourse and hesitated to go to brothels, spending his days in frustration. One day, his wife had to return to her hometown for three days due to a friend's wedding. His sister-in-law, Saki, came over with bento boxes and other prepared meals, concerned about the household chores while his wife was away. "You're young but already sexless... Well, our house is the same though..." The frustrated married woman, his sister-in-law, tempted Jun, who was brimming with sexual desire. Then, in the absence of his wife (sister), they indulged in each other's bodies... "It's not cheating since we're siblings by marriage," Jun experienced multiple orgasms with the mature body and intense pleasure that he couldn't taste with his wife.
