The Jackie Chan Adventures part got messed up, so you can skip straight to Inuyasha. He accidentally arrives in Inuyasha's world and finds Inuyasha as a baby. To get back home, he has no choice but to set out in search of the Shikon Jewel.
On a chaotic continent, monsters run rampant and war rages everywhere. A young man emerges from a lake and, with his own fists, builds a peaceful continent and establishes rules of his own. He himself stands above those rules, surrounded by beautiful women and ruling over the land! I'm no good at writing summaries.
This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.