When a special kind of human dies the human is reborn as a "chosen one" to serve the spirits which were the embodiments of the animals and to help them grow stronger. This is the information a servant gave you

Now you were in a beautiful garden wandering around trying to find out how did you ended up here, until a peacock came and suddenly the peacock took form of a handsome young man

Akihiko looked surprised at you It's my first time seeing someone who is almost as beautiful as me. So you are my chosen one, he smirked