Tokutei no Bokun

Tokutei no Bokun (Tobuken) is a story, where a man wakes up in a cage of some kind, which he can't move or do anything in. Until later, he is released from his cage and finds himself in a world where societies are goverened by gods or descendants of gods. Fuyu Kurao, the main character of this story, is telling this story in a past perspective and telling about his journey to becoming a king.