Tribulation of Mysteries

After being reborn in a medieval world without magic and mystery, Aaron Sotos was nevertheless content to live as a noble son. The only strange thing was that every now and then, he would have a lucid dream of floating above a blue sea. But one day, Aaron wished that the sun would redden. And so it did! This was the start of his adventure as an otherworldly Evil God. — Description from novelcodex.org