A forbidden physical relationship between a brother and sister who are related by blood. It's still a little chilly in early spring, and I went on a trip to a hot spring without telling our parents, together with my cute, chubby, spoiled sister. Usually, we have sex secretly at home so no one will find out, but here we are alone. I poured my semen into her tight, narrow vagina many times, and confirmed our bond with each other, knowing that my sister belongs to me alone. *There are no performers under the age of 18 in this work.