Year 2815, the world is conquered by a man with the name of ''Shadow''. Though, that doesn't mean he has ruined anything. In fact, he made the world even better. Although, he has set a rule: That teenagers the age of 15, the age where compulsory teaching ends, must be sent at an artificial place where a huge tree is located named ''Project Natura''. There, they must beat a game ''Project Natura'' has, in order to go back to their place and live ordinarily again. So, our heroes, Yonekon and Kyo are sent there. What will the face? Will they beat this game?