The second release from exclusive Madonna, Sumire Shiraishi! A few years after marrying her university professor husband and quitting her job as a flight attendant, Sumire had been trying to conceive but had not been blessed with a child. One day, Sumire invites her former colleague Nanami over to her house. Nanami ends up leaving something behind at Sumire's house... The next day, it is Nanami's husband, Shuuji, who comes to retrieve the item. Sumire had no idea at the time that she would end up having a relationship with a man other than her husband, and with Shuuji, who is also her friend's husband...