His aunt Maya is coming to Tokyo for work and is staying over, and his nephew Toshitsugu can't contain his nervousness. When he meets Maya again after a long time, she is even more beautiful than he remembered. For Toshitsugu, living with her for a short time is like a dream, and he can't help but get excited by seeing Maya defenseless. At that time, Maya, who has nothing to do in her room, ends up masturbating. Then, by chance, Toshitsugu returns home and witnesses her being wild and wild...