Shitennou Saijaku Datta Ore. Tensei shita node Heion na Seikatsu wo Nozomu  

I Was the Weakest of the Four Heavenly Kings. Since I Have Reincarnated, I Want to Lead a Peaceful Life, 四天王最弱だった俺。転生したので平穏な生活を望む

In his previous life as an ogre, Ranga was incredibly powerful and became one of the top four demons in the land. Despite this, his comrades betrayed him, leading to his death. After his death, he reincarnated as a human with all of his previous knowledge and strength. With this new opportunity, what do you think he will do?