Deai Keifurin: Ochita Hitozumatachi(2004)

Kazumi has been married to Naoki for four years. Troubled by a stale sex life with her husband—and having failed to reach climax again that night—she indulged in masturbation using a vibrator. The next morning, Kazumi accidentally threw away the envelope containing her husband's paycheck along with the burnable trash. Desperate to fix the situation before he found out, she turned to a dating site to solicit paid dates...