The Birth of Laplace
The birthplace of the Laplace is unknown but when he came to his senses, he finds himself in a cave near the demon world. He was a nameless creature with one head, translucent white skin, and wings on its back. He was unknown to the outside world. Because of the two strongest race identities, Laplace was too strong for his child's age. He was able to kill many short and weak monsters near his cave. Later he ate them to survive.
Laplace's First Encounter
Laplace was living peaceful life in the cave. One day he encountered a family of demons. He planned to attack them, but sometimes he realized and experienced something first time in his life. The demon family was playing with each other and laughing together. This was the first time Laplace feels like something weird. He decides to make friends, play with them, and laugh together. So he followed the demon family when they start moving towards their hideout.
Encounter With Demon King and Laplace's Defeat
Laplace reached a town of demons following the demon family. He was very happy to see many creatures similar to him in the town. But when he entered the town suddenly demons start shouting at him. Some demons attack him but Laplace defeated them easily. This all happened because of his hybrid body of dragon and demon. Soon a huge creature appears in front of Laplace. He was the demon king of that town. Demon King defeats Laplace very badly.
Laplace Meets Dragon God Ryujin and Got His Own Name
After the defeat by the demon king. Laplace comes back to his hideout in the cave. He was badly injured in the encounter. The injuries were getting worse day by day. He was almost going to die if Dragon God did not notice him.
Some demons killed the dragon world's people, so the Dragon god visited the same forest where Laplace lived for revenge. Dragon God Ryujin killed the criminals, who escaped to the forest after killing his people, and when he was going to return, suddenly he noticed the injured Laplace laying near the cave. Dragon races were able to fly.
Ryujin took him on his shoulder and bring him to the dragon world
After reaching the dragon world, Laplace realized that the man who saved him is the Dragon God himself. The strongest creature in the Mushoku Tensei world. Later Ryujin introduced Laplace to his wife. Laplace was a kid. He was totally shocked by what was happening to him. Ryujin's wife asks the Dragon God to adopt the Laplace and requested the Dragon God Ryujin to give him a name. Then Dragon God gives the name Laplace to that kid. This is How Laplace Got His Own Name.