On this earth with a population of more than 60 billion, I am obviously very small, as small as a grain of sand. I just hope to have a place to stay. But maybe my origin is a mistake. I grew up under the love of lies. Fortunately, I have someone with the same disease to support me. I just hope to grow up quickly, so that I can break away and be simple. However, I met him. What will happen when parallel lines that can never intersect are intertwined...