"Riho", a high school student who came to Tokyo to take an exam in Tokyo. In the meantime, the reception destination is the "Kimura family", a relative of "Riho". The "Kimura family" has a dull ronin son named "Ichiro", but he doesn't study every day and just masturbates and masturbates, and there is no sign that his academic ability will improve. Such "Riho" and "Ichiro" will meet again for the first time in about 10 years ... cousins who have grown into huge breasts that will catch her eye before you see them for a while. "Ichiro", who remembered that they used to take a bath and sleep together in the past, sent a passionate look at "Riho"'s breasts.
