Yuka, a married woman living with her husband and brother-in-law, Shu. One day, Shu, who continues to be an unsuccessful actor, finally passes an audition for a stage play. However, the inexperienced Shu struggles with the 'kissing scene.' Yuka offers, 'I'll practice with you,' and they kiss... As Shu's intense kissing becomes more passionate, Yuka finds herself getting carried away and starts entwining her tongue with his. Since then, telling themselves it's 'for rehearsal,' the two of them begin their private stage performance...
