This is a secret memory that can never be forgotten. Koichi, my husband's best friend, came to our house on a business trip. Koichi, who is five years older than her husband, is like her husband's older brother. I felt happy when I saw my husband, who was happy to see him again after a long time with a bright smile on his face. However, I was attracted to Mr. Koichi's charm as a man, which my husband did not have. The more I think it's useless, the more I can't suppress my burning desire...