Introduction: On December 31, 2090… at 11:59 pmA large meteor comes hurtling into earth. But, contrast to what was expected, it was destroyed even before it lands.At the same time…Over 1 million of humans obtained the 'log-in system', where they can access the game called " World of Luck?, and have a chance to travel and explore a fantasy-like world!Soon, 4 years had passed, Adam, the protagonist of the story, was walking along the road and was soon dumbfounded by what appears before him…'Ding'[You received an invitation to enter the 'World of Luck'][Do you want to accept it or not?][Yes/No]?Ehh?!?...