It all started with a trivial matter. Tsujimoto, a dull and plain boy, and Miki, a gal with a bad reputation. In their third year of high school, they were in the same class for the first time and became friends. They studied for tests together, worried about their future paths, had lovers, and broke up. It's nothing special, but it's something they will never forget. This is a story of the spring, summer, fall, and winter of these two uneven people.