The life of Michiru and her husband is very happy; he goes to work at the company every day and cares for the family in the evening, while she focuses on building their home and managing household chores. This continued until one day, wanting to make it easier for commuting and exchanging work with a friend, the husband decided to move to a new house closer to his company. Unbeknownst to them, this friend, who is also Michiru's unforgettable ex-lover, lives right next door. Although he had left her for another woman before, her feelings for him remain deep, and the memories flood back, causing her to constantly think about him. One time, when her husband asked her to go to the company to pick up some things, Michiru unexpectedly ran into him. Overwhelmed and unable to control her emotions, she asked him to do that with her one more time...