Let's Buy the Land and Cultivate It in a Different World (Manga) Vol. 5

Kidan possesses a gift called the Supreme Wielder and was summoned to another world. Together with the mermaid Plattie and the dragon Veel, he has built a homestead on the frontier. Every day Kidan's new home grows more lively. That is until a gang of beautiful elven thieves attack! Even though they are instantly subdued, their motives remain a mystery. Why would these thieves attack a peaceful lot of land?