The Overpowered Newbie

With his orphanage on the brink of closure, Kim Jaeju needs to get rich fast. His best shot is to conquer the mysterious tower that appeared in the world seven years ago, except that few who enter the tower ever manage to return. Jaeju is just about at his wits' end when all of a sudden, he receives a bunch of videos featuring himself clearing the tower in the future! With his own comprehensive walkthrough in the palm of his hand, will this overpowered newbie be able to conquer the tower? (Source: Tapas)