A few years after marriage… Mina, living with her husband and only son Takashi, started to feel a bit bored with their mundane daily life. One summer day, she went to the public pool to deliver her son's forgotten item and met Yuuta (a college student) who was a swimming coach. The story begins there.
A few days later, Mina, who ran into Yuuta on the street, invited him to 'Come eat at my place?' From that day until the end of summer, Mina indulged in adulterous sex while her son was at the public pool… Once a
