Yumi Ishida is a married woman, distinguished by her beauty, gentle disposition, and caring nature. She harbors a deep love for her husband and strives to be the perfect wife. Unbeknownst to him, she carries a significant financial burden, having accrued substantial debt after guaranteeing a loan for a friend.

During her high school years, she had a history of promiscuity, marked by group encounters recorded on video and a very high number of sexual partners. Upon meeting her future husband, she resolved to leave that past behind entirely and embrace a new life as a simple housewife.

The pressing weight of her debt forces her to seek a swift repayment solution. The only viable option she finds is working as an actress for a pornographic production company operated by Yabe, an old acquaintance from her student days with whom she shares relevant prior experiences.

Initially, she is consumed by guilt over this betrayal of her husband's trust. As she continues to participate in more film productions, her feelings of remorse gradually fade. This erosion of guilt becomes a source of deep personal distress and anxiety. Yabe posits that this behavior reflects her true nature, which she had only temporarily suppressed, and she grows increasingly troubled that this assessment might be correct.

Her husband eventually discovers her secret activities.