Keito and Ami are a loving couple who have been living together for four years. Their daily life runs smoothly, with no complaints from either side, but recently their sex life has gradually become monotonous. One day, they host a small get-together with old friends at home and enjoy a cheerful evening. However, after drinking too much, their friends pass out in the living room. With an unusual atmosphere in the air, Keito seizes the moment and begins touching Ami. This break from routine pushes their relationship into thrilling new territory.