Mirai Nobuyama

Bad at sports, Takeshi and Ryo, a gay couple, get together with Akira and Mitsuo, another gay couple, to participate in a beach volleyball tournament all the while Ryo is set to meet a man he met on a dating site. As the tension grows, Takeshi's older sister, Rika, shows up with her lover, Yuichi, who was the captain of the volleyball club in high school.

After her parents died, Mirai, an office worker, lived with her brother Keisuke in the house they left behind, helping each other out. But one day, her brother left the house after a certain incident. Mirai has been waiting for her brother to return to her spacious house. Mirai is still a virgin. Every night, she imagines it, running her fingers over her and letting out moans. Mirai has also found a boyfriend. But when the time comes, her body is unable to accept him...