In this work, a brother and sister have an intense relationship in a shared room, and I was thrilled to read the unexpected turn of events. The description of the main character resisting her brother but gradually becoming absorbed in pleasure was so realistic that I felt as if I was there. The sex scenes with the adulterous brother were very exciting, with descriptions of convulsions and squirting. There was also the thrill of continuing a forbidden relationship without the parents finding out, and I read the book without getting bored until the end. Overall, there were many naughty scenes, but the story was also well written and very satisfying.