"Congratulations on your graduation..." I said the same words to Hajime-kun, my son's friend, as I did five years ago. It was Hajime-kun who comforted me with awkward kisses on the day I found out about my husband's infidelity. On the day of the graduation ceremony, which I faced with feelings of conflict and guilt, I finally gave in to Hajime-kun's feelings and we became physically intimate. Since then, we've been continuing our secret relationship, stealing moments away from my husband and son. However, today, five years later, Hajime-kun has a girlfriend, and he's asking me to decide whether or not we should continue our arrangement...