This book has been relaunched under the title Pokemon: Endless System. Follow the link below to go straight to it.
A young man is reborn as the mentor of Lorelei, the granddaughter of the old-generation champion known as the Icebound Queen. Haunted by the regrets of his previous life as a twenty-six-year-old shut-in, he starts a plan to raise a little girl at the age of four. When he gets his first Pokemon egg, he activates his first System. On his fifth birthday, the System tricks him by assigning him a main quest. He finally completes it before his fifteenth birthday, and his second System is activated at last. Thus begins Ruofeng's glorious life.
This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.
The introduction is really interesting. He was reborn as Kona's master, but the next sentence is not even his younger brother.