Rimuru had been called to attend Walpurgis, by non-other than Guy himself. Realizing the dire situation, Rimuru makes haste to attend the banquet. But before he could properly arrive, in the middle of the transfer, an unknown mysterious power had sent Rimuru back in time. Back to his first appearance as a slime! This fanfiction is based on the Light Novel! Note: There is a re-write currently ongoing as I've decided to stop uploading chapters for this book. I do hope you check it out sometime.