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