When her parents remarried, Yuzuru had another sister. His stepmother was very beautiful, big and round buttocks made Yuzuru always peeking. Moreover, she always wore short skirts that made her T -shaped underwear in front of Yuzuru, who had to try a lot to control herself. But once, his stepmother came to his room and complained that her butt was getting bigger. From college students to uncles at the convenience store, everyone only focuses on her buttocks. The stepmother asked Yuzur to check whether her butt was normal. So the beautiful stepmother unexpectedly brought his butt close to Yuzuru's face, the cute white underwear, the round buttocks he craved before Yuzuru's eyes, Yuzuru could not help it! He took off his pants and pushed his dick into her! Since then their bad relationship begins. Despite being rejected, her sister continued to show Yuzuru to see her big butt, as if she was inviting him ...