Hina's mother and Kenta's father just remarried, so they both became stepsiblings. Hina appears to be a very intelligent but shy girl, she was chosen to be the representative to give a speech at the university graduation ceremony. Kenta is also shy like Hina, but he is not as intelligent as his stepsister. Therefore, their parents asked Hina to tutor Kenta to help him pass the upcoming university entrance exam. However, Hina has a secret that no one else knows, she is very sexually attracted! Every day, Hina "accidentally" brushes her breasts against Kenta, shows her panties to reveal her vagina in front of him. Even when caught by Kenta having sex with her boyfriend, Hina intentionally lets him see more.TYSF-026 The step-sister is lascivious and the younger brother is lucky Unable to resist the seduction of his stepsister, they secretly have sex right in front of their parents! Of course, their parents did not notice because Hina covered up with her long dress. However, they still had to limit the noise, pretending to be as normal as possible. The thrill of the possibility of being caught at any moment made Hina extremely horny. She even made Kenta have sex with her bare and ejaculate inside her vagina! And from then on, in front of their parents, Hina appeared to be a caring sister, trying to help her brother with his studies. But in reality, they were constantly having sex in secret...
