Congratulations on your graduation... Five years ago, those were the words I sent to my son's friend Hajime-kun. It was on that day when my husband's infidelity was discovered that Hajime-kun comforted me with his awkward kisses. On the day of our graduation ceremony, filled with doubts and guilt, we finally consummated our relationship. Since then, we have continued our secret affair while avoiding the eyes of my husband and son. However, today, five years later, after learning that Hajime-kun has found himself a girlfriend, I find myself forced to decide whether or not to continue our secret relationship... *The contents may vary depending on the distribution method.