Witch's Journey: Reincarnation and Walking with Irena

A demon king from another world can perfectly use magic and various weapons. However, he was too invincible and lonely, so after thinking for a long time, he decided to reincarnate. After being reincarnated and entering the world of magic, no one dared to imagine that the Demon Emperor, who had been single for tens of thousands of years, would be slowly conquered by a gray-haired girl. From then on, this girl was always accompanied by a looming boy. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.