Horobi no Kuni no Seifukusha: Maou wa Sekai wo Seifuku Suruyou desu

In the seemingly idyllic world of the Shiyalta Kingdom, a young man named Yuri leads a life devoid of purpose. As a self-proclaimed "no-lifer," he idles away his days in front of a computer, content in his lack of ambition. However, his life takes an abrupt turn when he finds himself reborn in the Shiyalta Kingdom, a world that has known centuries of peace and prosperity. Here, he is blessed with loving parents, a comfortable home, and a promising future as a breeder and raiser of birds on his father's ranch. The kingdom's warriors, skilled in the art of combat, periodically set out to join distant battles, trained by Yuri's father and others on massive birds. Yet, beneath the kingdom's tranquil surface, a sense of unease lurks. The distant wars, though irrelevant to the kingdom's citizens, will not remain so forever. As Yuri navigates his new life, he begins to realize that the kingdom's seemingly airtight bubble of peace is on the verge of shattering.