At the end of the year, I went back to my hometown in Niigata. There, I met my cousin Tsubasa-chan for the first time in 10 years. Our long-awaited reunion brought back bittersweet memories of those days. After all, she was my first love and also my first kisser. "Hajime-chan... I'm a married woman now." But she has a husband... And I have a wife... Even though we were each other's first loves, we were both married. We must never make any mistakes. Who would have thought that I would end up spending the night with her under the same roof for three days during her visit home...?