A researcher gave up his childhood dreams to improve the world a little bit. After finding out that his selflessness was punished, he found himself in a world full of spirits, dungeons and concept stones. He now bears the new name Aurelis. On his adventure to write an encyclopedia, he meets Grimoire, who is avid to change the world. Aurelis must face the world’s secrets, but also his own, as he now wears the title of the Primordial Sin of Selfishness.