In the Ultraman Universe, I Break Off the Engagement from the Start

The Crown Prince of the Land of Light, Taro, was a once-in-a-generation genius. But after an accident robbed him of his cultivation, his fiancée broke off their engagement. Thirty years east of the river, thirty years west: never look down on a poor young man! Now, however, Taro has unexpectedly discovered that his brothers are all more than they seem...