It is just another ordinary day for Satoru Mikami. The sun is shining brightly on the streets of Tokyo, and he is in the midst of a discussion with his colleagues when suddenly he gets stabbed by a passing robber. The average 37-year-old corporate worker is now at death's door, and he has only one regret—dying a virgin. Fading out, he is startled by a mysterious AI-like voice reciting commands. Satoru abruptly wakes up in the middle of a strange cave, but something odd has happened: he is now a goop of slime! Thanks to his new body, he has acquired the skill to absorb anything and obtain its appearance and abilities. While testing out his newfound powers and exploring the cave, he stumbles upon a massive dragon named Veldora, who has been sealed away for the past three hundred years. After quickly befriending the beast, Satoru decides to help him escape; in exchange, Satoru is bestowed a new name: "Rimuru Tempest." Wishing to avoid a life like his boring and mundane past, Rimuru is about to set out on a grand quest that will change his own destiny and the fate of his new world. [Written by MAL Rewrite]

Lonely thirty-seven-year-old Satoru Mikami is stuck in a dead-end job, unhappy with his mundane life, but after dying at the hands of a robber, he awakens to a fresh start in a fantasy realm...as a slime monster! As he acclimates to his goopy new existence, his exploits with the other monsters set off a chain of events that will change his new world forever! (Source: Yen Press)

After separating from Eris, Rudeus falls into the depths of depression. He travels to Rozenberg, the second city of the Principality of Basherant, to search for his missing mother, Zenith. Desperate, Rudeus tries to accept a high-ranking quest alone in order to make a name for himself. However, by chance, he ends up working with a party of B-rank adventurers called the Counter Arrow. One of the party members is a girl named Sara, who reminds him of Eris...! (Source: Frontier Works, translated)