When I went back home out of season because my father was getting remarried, I happened to meet Marina, a senior I had a crush on in my school days. When I told her that I had no place to stay at home, she pulled me by the arm with the same innocent smile as before, saying "Why don't you come stay at my place?" On the way to her house, I talked to Marina and found out that she was being transferred to Sapporo, and she looked a little lonely compared to usual. Then, that night, after everyone had gone to bed, Marina came to my room...