Mayumi Kawamura, 43, from Ibaraki Prefecture. Currently working as an office administrator at a publishing company, she frequently handles various magazines and books due to her job. Recently, she's noticed an increasing number of eye-catching sex specials and dating advertisements in entertainment news. Particularly drawn to headlines about affairs and infidelity, she began comparing them to her own marital sex life—and before she knew it, impulsively submitted an application. Today marks Mayumi's first-ever experience actually trying out the taste of cheating.