Hajime obviously had his own reasons for telling Aiko this story. According to the Gods’ intentions, the heroes; Kouki and the others, were made to dance in their game, and the Gods never intended to return them to their own world. To save the human race from the demon race, in other words to win the upcoming war, is the result of the Gods pulling the strings behind the stage in the first place. The heroes themselves were only interesting pieces they had gathered without any real reason. Rather, they only thought it was more appropriate to start a new game using the heroes.