Tomosaka Kenji, the main character of this story, moved to this coastal town when he was a child. At that time, the sea spread in front of him was shying like lamune (lemonade), reflecting the sunlight of the summer. There, he met a girl. Her name was Kokonoe Nanami, who lived next door. Her room was only 1-2 meters away beyond the veranda. Their rooms were so closed as if they were within their arms' reach. As the time passed, the seasons came round, they memories has been accumulated with time. They think of their normal lives and common relationship as precious things. The sun begins to shrine strongly, cicadas begin to buzz, and the sky clears up…Here comes the summer, again! For Kenji and Nanami, it is normal summer, but it has special meaning…