Immortal Nani

Once upon a time, a young man was there before the birth of the universe and the creation of the worlds, no one knows how or why or when he was there? He played with the chaos beasts and raised the young gods while he travelled through the multi universe, he lived until a group of young gods world developed, there with them until all departed and he remained, he saw the the animals evolves and dies, he saw a young goddess creation called "humans" developing and dominating the whole earth under his raise and care, it was all going just like before by being a "nani" but it all changed one day.