Mikami Satoru was just an ordinary 37-year-old man living a simple life. He had no big dreams, no exciting adventures—just a regular job and a peaceful routine. However, everything changed one day when he was suddenly stabbed by a random attacker. As he lay on the ground, thinking his life was over, he heard a mysterious voice speaking to him.
When he woke up, he found himself in a strange new world. But there was something even more shocking—he had been reincarnated as a slime!
At first, Mikami Satoru was confused and frustrated. In his old world, slimes were weak monsters that adventurers easily defeated. How was he supposed to survive in this form? He couldn’t see, he couldn’t hear, and he didn’t even have hands or legs! But as he adjusted to his new body, he discovered something interesting—he had powerful abilities.
One of his unique skills was called Predator, which allowed him to absorb other creatures and gain their abilities. This gave him a huge advantage in this new world. Instead of being a weak monster, he could grow stronger by consuming different things.

That Time I Got Reincarnated as a Slime Plot
While living his new life as a slime, Mikami stumbled upon a powerful and dangerous creature—the Storm Dragon Veldora. This dragon was known as a Catastrophe-level monster, feared by everyone in the world. However, instead of attacking, Veldora spoke to Mikami and explained his situation.
Veldora had been sealed away for hundreds of years, trapped inside a magical barrier. Despite his overwhelming strength, he was lonely. Mikami, who had no reason to fear death anymore, approached the dragon without hesitation. Instead of fighting, the two became friends.
Mikami gave Veldora a new name—Veldora Tempest—and in return, Veldora gave Mikami a name as well—Rimuru Tempest. With this new name, Mikami’s fate began to change.
With his growing powers and his friendship with Veldora, Rimuru set out on a new journey. He quickly learned more about this fantasy world, meeting different creatures like goblins, orcs, and dwarves. Using his intelligence from his past life and the abilities he gained as a slime, he started helping others and forming new alliances.
But this was just the beginning. As Rimuru continued to grow stronger, he found himself involved in battles, politics, and even the fate of entire kingdoms. Despite starting as a simple slime, he was on his way to becoming one of the most powerful beings in the world.
Mikami Satoru, who once lived a boring and ordinary life, had now become Rimuru Tempest, a legendary figure in a magical world. His journey, which started with a simple act of kindness towards a lonely dragon, would change the world forever.
But what adventures awaited him next? Only time would tell.

What is the release date for That Time I Got Reincarnated as a Slime Chapter 129?
will come out around April 28, 2025, for the following regions.
- Pacific Daylight Time [West Coast]: 8:00 AM PDT (April 28, 2025)
- Central Daylight Time [Central America and Canada]: 10:00 AM CDT (April 28, 2025)
- Eastern Daylight Time [East Coast]: 11:00 AM EDT (April 28, 2025)
- Greenwich Mediterranean Time [Britain]: 3:00 PM BST (April 28, 2025)
- Philippines Standard Time [Philippines]: 11:00 PM PST (April 28, 2025)
It will be available to read on April 29, 2025, for these regions.
- Korean Standard Time [Korea]: Midnight KST (April 29, 2025)
- Japanese Standard Time [Korea]: Midnight JST (April 29, 2025)
- Australia Eastern Daylight Time [Australia]: 02:00 AM AEDT (April 29, 2025)
Where to read That Time I Got Reincarnated as a Slime Chapter 129?
That Time I Got Reincarnated as a Slime Chapter 129 will be available to read on Pocket.