"That Time I Got Reincarnated as a Slime" is a Japanese light novel series written by Fuse. The story follows a man named Satoru Mikami, who is killed and reincarnated in a fantasy world as a slime, a low-level creature. He gains unique abilities, including the power to absorb and mimic other beings, which allows him to navigate this new world. As a slime, Satoru, now known as Rimuru Tempest, embarks on adventures, befriends various creatures, and builds a community. The series explores themes of friendship, power, and the challenges of leadership in a world filled with magic and monsters.