How I became a Modern Demon King

Reiji Toujou is an average guy with an average life. From school to his social life, Everything about him is average. However, all of that changed on a fateful night where every single person in the entire world was teleported and separated in another world, similar to earth. Luckily, Reiji was still with his family, consisting of his single mother, little sister, little brother, baby brother, and grandfather. Together with them were the leaders of the major countries of their world. Concerned for their well beings, they all discussed what could’ve happened to them. Soon, the leaders, confused and angry, started to place blame on each other’s country. Suddenly, A person, wearing golden clothes, walked into the room. He seemed like the king.