An Anime Crossover Starting with Rimuru

As a transmigrator, I've seen plenty of people from the past transmigrate into Naruto and One Piece, and plenty more transmigrate into Soul Land and Battle Through the Heavens. I've even seen someone transmigrate into Oreimo... But why did I transmigrate into That Time I Got Reincarnated as a Slime? Still, my starting situation is pretty good...

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.