Overview

``Amu'' is a high school student who came to Tokyo to take an entrance exam in Tokyo. The host family is the Kawasaki family, who are Amu's relatives. The ``Kawasaki family'' has a son named ``Shintaro'' who is a ronin student, but he does not study every day and only masturbates in front of the computer, leading an unproductive life. Meanwhile, ``Amu'' and ``Shintaro'' meet again for the first time in a while, but ``Shintaro'' notices that his cousin's breasts are ridiculous. Shintaro, who remembers how they used to often take baths and sleep together, can't help but want to see Amu's breasts.