Fishie Man

From Kokorodatabase

Also known by twenty thousand other titles, this is Shiroi's self proclaimed superhero name. Technically, he's not actually anything other than an idiotic fox demon, but don't tell him that. D:

In a way, it's somehow its own universe, despite being a small town. The residents live in a city called Aqua City, an aquatic-themed town full of people who have fairly much given up hope on the day ever being truly saved. Shiroi and the other assorted 'heroes' live in Fishie Manor, which is tended to by penguin butlers.

Homicidal zombie penguin butlers, that is