Girls, be ambitious.: Aya, an erotic writer, lives with her boyfriend, Hajime, a company employee. Recently, they have been a little bit growing apart, and she feels somewhat unfulfilled. One day, Aya learns that the magazine to which she contributes will suddenly cease publication. That night, she is invited out for a drink by Tanaka, an editor whom she respects, and drinks deeply, losing consciousness. When she wakes up, she finds Tanaka in another room making intense love to a mysterious woman, Maria.