Naho is a housewife who lives in an apartment complex. Even though it was a very ordinary day, I was spending every day feeling a little bit of happiness. One day, Naho encounters a molester for the first time in her life on the train on her way home from shopping. Naho, who has been away from physical pleasure for a long time since she no longer spends her evenings with her husband, feels a strange excitement as well as fear. The next day, Naho, unable to forget that feeling of pleasure and excitement, boards the train again...