One night and two days of 1 night and left alone by my wife's sister who suddenly came over

My wife, Yuri, has returned to her hometown to attend a local reunion. After a long time, Toru was left alone at home, trying to enjoy his freedom, but without warning, his wife's sister, Hitomi, came to the house. Hitomi, who had been consulted by Yuri about her worries, said she would give Toru a scolding, but in fact she was planning to clear her sexual desires. Toru doesn't know his true purpose in Hitomi's bold behavior...