人妻の姉との禁じられた誘惑W不倫 ～ね、ねえさん、嫁より気持ちいい～

Tomoki and his wife Nozomi have to move due to a job transfer.
Due to the sudden change, it was difficult to find a property.
At that time, his sister Ryoko and her husband, who lived near where he was transferred, offered to live with him until they found a property.

A welcome party was held on the first day of living together. Nozomi is not good with alcohol and leaves the group early. His sister's husband also went to the bedroom early for work the next day.