Horobi no Kuni no Seifukusha - Maou wa Sekai wo Seifuku suru you desu

As a self-proclaimed no-lifer, Yuri spends his days idling in front of a computer. Everything changes when his life in Japan suddenly ends, and he finds himself reborn into the mysterious world of the Shiyalta Kingdom. His new life offers everything he previously lacked: loving parents, a cozy home, and a promising future raising birds on his father's ranch. For centuries, Shiyalta has thrived in peace and prosperity, protected by friendly nations that were also established after the fall of a once-mighty empire. War seems like a distant concern, affecting only the ruling families who occasionally send their warriors to join battles atop massive birds trained by Yuri’s father and others. However, this tranquil existence cannot last indefinitely. A dark undercurrent threatens the kingdom, and it doesn't take Yuri's exceptional intelligence to realize that those distant conflicts will soon become much more relevant.