Baron's House is where Baron Leltoy, Maron Leltoy, the rest of Baron's siblings, and parents live. It seems to be overcrowded, because Baron and Maron have so many brothers and sisters. Baron secretly wishes to move out and live on his own, but he feels it is his duty to babysit his siblings, so he can't bring himself to do it. He is encouraged to move out by Ace, who thinks Baron is old enough to live alone, and who is searching for a new flat for Baron, which leads them both to Klaus von Hertzon. (Ace battles alongside Klaus against Mylene.)