Aishichi has been married to her husband for seven years. Her husband is so busy that they barely have a nightlife or conversation. When Aishichi invites her husband to exercise, he suggests they go to a swimming class where her friend Ichijo is the coach. Aishichi is happy, but her husband quits the swimming class after just a few sessions. It becomes a habit for her to complain about her husband to her coach, Ichijo. Then, on the night of their wedding anniversary, Aishichi is shocked when her busy husband cancels their dinner plans at the last minute. She naturally thinks of Ichijo, and before she knows it, she's already at the pool...