Into another world

Sial is born at the house of Benjamin's. The family of Benjamin's owns a huge business empire in Tokyo. They have the Benjamin enterprise, the Benjamin Gold and the Benjamin vehicles. They have been around since 1834. Sial is the only child of his parents. He is a very joyful boy. He loves playing football and hide and seek. Sial loves both his parents. He loves hanging out with them. On his 9 birthday something terrible happens in the house of Benjamin. It's true that when you have a large sum of money you get alot of enemies. On sial 9 birthday someone attacks his house and kill everyone whose is present there. Sial mother and father dies protecting him. When the killers are about to kill him suddenly a portal open and everyone including the killers and the one who orders to kill them also and sial gets absorbed by the portal. When sial open his eyes he sees demi humans,goblins, elf's,demons and many other creatures. Sial is just 9 he gets confused and starts crying. There a family of demi humans who has no child adopts Sial. Since Sial is a human and is from another world he posses some extra ordinary powers.