Parts

Gyrosphere Part 1: The Birth
The very beginning of the story. This part revolves around Hermit Yabuki as his world is divided into 4 parts and is attacked by a celestial god Muggen. Hermit's family is murdered and his memory of his life prior to this event has been wiped.

Webtoon- https://www.webtoons.com/en/challenge/kai-and-tai-part-1-the-birth/list?title_no=277223

Gyrosphere Part 2: Kai and Tai, The God Children
This part takes place 15 Quintilian eons after part 1. Hermit now being that old thanks to his expertise in alchemy, is viewed by society as a crazy, shit-stained, geezer. However, he had viewed a prophecy about the nigh-omnipotent Gyro having two sons. Two meteors arrive on Earth to strike two people at random. Those two happened to be orphaned twins, Kai and Tai. They are forced to take on the challenge of becoming the successor to the nigh omnipotent father. At the same time, a man named Hiroshito, calling himself the fuhrer of the omniverse, starts to conquer everything in existence. Kai and Tai are being forced to fight him against their will.

Webtoon - https://www.webtoons.com/en/challenge/the-gyrosphere-part-2-kai-and-tai-the-god-child/list?title_no=238376

Gyrosphere Part 3: The Reawakening
Takes place one omniverse cycle after part 2. This part has no real main character, but revolves around the hero group called "The Legend League". More specifically, The Legend League "Top Ten". It all starts when Wolfkami's disciple and adopted son, Julian, becomes a host for a demon lord named Asmodeous. He starts his own demon army and destroys existence like an infinite black hole. There is also the existence of an anti legend league to appose the Legend League. The several evil beings fight the Legend League as well as a village of morally neutral martial artists for existential dominance.

Webtoon -   https://www.webtoons.com/en/challenge/the-gyrosphere-part-3-the-reawakening/list?title_no=213301