The hero just wants to live a slow life

A middle-aged man died while working. He is confronted by a man who claims to be a god The god gave Nagaiki an unreasonable cheat power and asked to save the world he would be placed in. After that Nagaiki was transferred to a kingdom that claimed to have saluted him as a hero whose aim was to defeat the demon king and save the world. After defeating the demon king, he disappeared somewhere and the kingdom that summon him continued to search for him. After defeating the demon king, nagaiki meets a beautiful woman from the lion-human race with dying silver hair. Nagaiki changed his goal and built a house in the middle of the forest, and lived peacefully with the lion race/ beast race woman named Hikari and have many children. From here the story begins.