Yuka, a housewife leading an ordinary life, lives with her husband's younger brother Masato, who has come to Tokyo to pursue a career as a stage actor. Her husband often comes home late, so Yuka frequently spends dinner time alone with Masato. One evening during dinner, Masato mentioned, "I have a kiss scene in my next audition, but I have no experience and I'm struggling." Having had too much to drink, Yuka impulsively offered to be his practice partner. The moment their lips touched, she was overwhelmed by a tingling sense of taboo...
