I got a job, and after my college life had settled down, I was returning home. Suddenly returning home, I couldn't meet my friend's schedule, and my sister's family was living in my parents' house, which made me feel uncomfortable and wandering around the lonely and nostalgic city. At that time, I happened to meet Ai-san, a senior in my school days, who was my first love. It seems that he will leave the house three days after moving, and he was happy to stay when he told me that he had no place to stay. It would be a lie to say that there is no ulterior motive. I will spend three days alone with faint expectations and love.