In the beginning, there was nothing but a gaping emptiness, then out of nowhere a flash of "light" occurred and "something" was "born", it had no intelligence, no emotion, no desire, no future, no path, till "it" "exploded", this was the "Big Bang" and out of that explosion five beings were born:

Chaos

God

Brahma

Atum

Ymir

The 4 being "killed" Ymir who desired constant destruction, he was brutal and started fighting the 4 others "first". Out of "his" body they created the Universe.

Chaos created the ever-compassing separation/barrier between the Universe and the Void.

Atum made the earth, by raising "the sea of chaos"

God created all "Heavens" and "Hells" of every mythology.

While Brahma made the Sun, thus leading to the solar system.

After billions of years, the primordial being also known as old gods were "born", Gaea (Earth), Tartarus (the Underworld), Erebus (Darkness) and Nyx (Night), and Uranus (Sky) were some of them.

Sometime later, Gaea and Uranus had children, 3 one-eyed cyclops and the Hundred-handed ones Hecatoncheires. However, Uranus being disgusted by them threw them into Tartarus. After that, they had 12 Children, the titans, Coeus, Hyperion, Theia, Themis, Phoebe, Cronus, Oceanus, Crius, Iapetus, Rhea, Mnemosyne, and Tethys.

Gaea wanting to avenge her children and free them, created a scythe capable of cutting a primordial and gifted it to her son Cronus, being the only one "ready" to rise against his father.

Together they tricked him out of his domain, the sky, and Cronus then ambushed him and cut him into many pieces, that he dispersed around the globe.

In his last moment Uranus however, cursed Cronus telling him that like himself, he will be defeated and dethroned by his Children.

Cronus then became the King of Titans, after seeing all of his family wedding themselves, Cronus chose Rhea as a wife, and they together had 6 children, which Cronus ate 5 of them, because the youngest child, Zeus, had been hidden by Rhea with the help of Gaea, who gave Rhea a stone which Cronus later ate thinking it was Zeus.

In the 21 first Century, 2022 a young teen was running extremely fast, his name was Percy, and behind him was a white truck, also known as Truck-sama/Truck-kun.

Percy was a normal athletic teen, loving books, manga, anime, films, novels, and unfortunately fan fiction, everything making his life more exciting. This night Percy was walking around listening to some music, why you may ask? Well, he was bored, and his body had been itching for some movement after reading the whole day one of his favorite book series, Percy Jackson.

However, in a random street, he saw a Truck going toward him, Percy having good reflexes dodged it, but then it came toward him again, adrenaline kicking he started running at a speed he would normally be unable to reach, he was going in many directions however the Truck was still following him.

After 5 minutes of sprinting, our mc realized that he was going to be reincarnated, so he stopped and faced the white Truck, his last words being "Please not Boku-No-Pico".

In an extremely big temple made from gold and white marble, an extremely beautiful titan was giving birth to a child. Near her was a big titan with a crown on his head. After hard times, the She-Titan named Rhea gave birth to her first child, Hades.

She took him in her arm and said with exhaustion "You shall be named Hades", however without waiting for that baby god to grow, Cronus took him

'This is no titan' thought the King of Titan and ate him in a matter of seconds.

(A bit before that)

"You shall be named Hades" heard the newly born god

'Oh! HELL NAH!' he exclaimed in his mind and while he was being angry at his fate of being eaten, his father opened his mouth and then ate him, while his mother, Rhea, had a horrified expression on her beautiful face.

"HAAAAAAAAAA" he cried out in his father mouth.