How I became a God

One day a Highschool boy, Suddenly got attacked by a stranger, after he escaped, he enterd a dungeon, where He find their are many Giants, monsters, goblins, and many other unknown things. He fight with all of them and survived one month. Suddenly he find a big cave and fight with a big monster, and received a power to become a God. But his story will not end here, He doesn't know about his own power and his authority, So many things will getting interesting to start here.