No One Told Me This Is Not a Game

'Crimson' descends, and 'obscurity' destroys the world. This is a harbinger of doom that lingers in the world of stars. When the 'Crimson Moon' looks down on the world, the 'Son of Obscure' will be reborn under his gaze, carrying the 'Crimson' will to bring an end to the world. This is the background story Russell learned in a game. When the 'Son of Obscurity' arrives, everything will be ended and destroyed. In order to prevent the world from ending, the Tower of Apocalypse concealed the world and started a forbidden summoning ceremony, with the intention of summoning a great person who can save the world. Good news, the ceremony was successful in the end, and Russell, with the memory of the 'game', successfully traveled into the game. Bad news, something went wrong with the ceremony and he became the Son of Darkness.