I was the weakest of the four heavenly kings. I reincarnated, so I hope for a peaceful life

I was the weakest of the four heavenly kings. I reincarnated, so I hope for a peaceful life – One of the four demon kings, Demon King Langa, was despised as being the weakest of the four heavenly kings and a demon mess because he was made up of the lowest species. One day, he was defeated by fighting alone with a brave party in the plot of the other four heavenly kings. You will lose your life. Reincarnated as a human child, he wants a peaceful life this time, but he has awealth of combat experience, an excellent but dangerous lieutenant who longs for him, and his magical power is 100, 000, 000. “I will lead a peaceful life this time! ” His wish will come true… ?