The Gods are Always Watching

Adam and his family members were forced to be the first of Humanity to enter a Dungeon. Unfortunately, he lost his beloved mother and siblings there. He was the sole survivor, and he only survived because of his luck. Or was it his misfortune that let him survive? When the survivor is only 12 years old and when the deaths of his familiy members hang above him like a curse, how can he survive in such a hellish world?