Maki, who lives a life of mismatched relationships as both husband and wife work, one day goes on a business trip with her boss, Ozawa. Ozawa is the most reliable person for Maki, and the business deal is successfully concluded. Maki drinks with Maki at the after-party, and perhaps out of a sense of accomplishment, she ends up getting drunk. Ozawa is aroused by Maki... As if responding to Ozawa's intense caresses, Maki gradually begins to kiss him and wraps her legs around his back... And even after returning from the business trip, the two continue to have a secret affair...