Alumni reunion held after a long time. - Aika was excited to be reunited with her ex-boyfriend, but at the same time, she had mixed feelings. - Even as I reminisce about my memories, what crosses my mind is the thought of what the future would have been like if I hadn't broken up with this person at that time. - I couldn't help but compare it to my current marriage, which can hardly be called a happy one. - At that time, I was too young to be honest. - But now... - With the memories and emotions of those days coming back to her, Aika unexpectedly blurts out, "My husband is on a business trip and there's no one at home. If you don't mind... could you come?"