The theme of this work is "Journey to the Universe". A samurai, moved by the energy of the sun, travels through the vastness of space. On his journey, he is drawn to a planet with oceans like Earth, and encounters a civilization he has not yet seen. And as he lives on an unknown planet, he remembers his precious friends from Earth. However, no matter where he lives, it is always himself who is in the middle of the hustle and bustle.