Knowing that my free-spirited sister is being watched by her brother, she brings a man in and works hard at studying, and finally... my sister who spends the night on her brother! Mitsuki, who wants to have sex with her favorite older brother while her parents are staying out, seduces her older brother by all means! Of course, my older brother refuses, but I wonder if I can maintain my reason for the many extreme provocations of my cute sister! ?
