Let's Buy the Land and Cultivate It in a Different World (Manga) Vol. 2

Kidan, (formerly Norio) our hero, has charmed a mermaid, a lich, and a young dragon with his welcoming personality, cooking abilities, and his skill: Supreme Wielder. Things get a little more complicated when it turns out Platy, the mermaid who has decided to become his wife, is actually a mermaid princess! Now that she's marrying Kidan instead of one of the leaders of the warring factions, the mermaid nation, the demons, and the humans are all after Kidan! How is cooking going to save him from an all-out war over the woman he loves?!