A married woman, Yuka, who lives with her husband and brother-in-law, Mamoru. One day, Mamoru, who continues to be an unsuccessful actor, finally passes an audition for a stage play. However, Yuka says to Mamoru, who is troubled by the "kiss scene", that she will accompany him during the rehearsals and kisses her... Yuka, who has become obsessed with Mamoru's intense kissing act that does not know her control, also extends her tongue and entangles herself. Since then, she tells herself, "I'm practicing for a play," and the stage begins with just the two of them exchanging kisses with Mamoru...
