Bullying at school and the lack of attention from his caretakers have troubled Yuuya's existence. But after he relocates to his grandfather's previous residence, he stumbles upon an alluring entryway. Curiosity getting the better of him, he enters and is transported to a stunningly enchanting universe. In this realm, he uncovers boundless riches and remarkable prowess that he brings back to Earth, intending to begin a new life.