This is the story of the longest and too short days of my life when I returned home. I was called to an out-of-season hometown because my father was remarried, and I happened to meet again with my childhood friend, Hijiri-san, who was my first love. When you tell me that you don't have a place in your parents' house, does Sei come to us? I was invited to stay at Sei-san's house for three days. And I asked Sei for three days to remember the feelings I should have forgotten when I was a student.