Something is wrong with my younger sister who has entered adolescence ... She is reading a book with a slapstick. She became more and more gazed at it. I was obsessed with hentai manga, but when I said "I have a request for my brother ...", I was supposed to do incest H that reproduced an unexpected hentai manga ...! My brother's reason shatters to my sister who shyly says obscene words and secret incest!