A pretty good secret incest movie about her cousin Otomi Rina during a visit to her uncle's house. Otomi is a very arrogant, beautiful, and equally flirtatious girl. Nothing would have happened if Otomi hadn't accidentally angered her cousin because he was always sitting on the phone. One time, he teased him in front of his parents, so he got angry at his older sister. To make up for this, the older sister showed him her breasts and thought that this was normal for a newly pubescent boy like the younger brother. However, Otomi did not expect that even though he was so young, he was a master at fucking. Then that night while Otomi was sleeping, his younger brother...