Prestige exclusive actress "Nonoura Tan" turns into a sexual processing tool.My older sister "Wan" is a college student who graduated from a girls' school who is ignorant about romance.She seems to have a boyfriend for the first time recently and seems to be floating a little.I love my sister who is beautiful and kind and takes care of her, so I always watched her with cameras set up in her house.One day, when I was checking the recorded data, I saw my sister being forcibly violated by three men.She seems to have fallen for her boyfriend's evil schemes. 'I've been putting up with it for a long time, but I can't believe I'm feeling it with another dick...' The strong jealousy of a stranger explodes the inferiority that I've been suppressing.Pushing down her sister and biting into her lips, I will commit her desires.A story about a beautiful older sister who I love falling into our sex treatment.