Western Fantasy: Becoming a Summoner to Fight the Demon God

[Fantasy World + A Little Farming + Summoner] A future Demon God uses its immense power to erase the very existence of the demon race from the present world. People stop paying attention to demons, even forgetting the danger they pose. Only Cohen retains his memories, thanks to the help of a mysterious phantom. He becomes the world's one and only summoner, embarking on a path of summoning servants to fight the demons. The only problem is that his summoned creatures don't look very respectable: ghosts, demons, demon trees, and undead lords. Cohen: “Even though my summoned creatures all look evil, I really am saving the world.” Cohen makes friends along the way and forms alliances with various nations to fight the demon race together. In the end, Cohen uses his summoned creatures to defeat the Demon God. The world begins moving toward peace, while Cohen stands at its pinnacle, looking down upon all living things.