LV99 Demon King’s Servant. I Was Reincarnated in the Game World That I Used to Play in My Previous Life, so I Will Do My Best to Guide My Favorite Demon King to a Happy Ending

The protagonist is a reincarnated villainous aristocrat. His name is “Varian Klovrulm.” One day, Varian realizes that he is a reincarnated person and that the world is the world of the game “Fielder Resonance,” which he played in his previous life. In that game, he has “favorite character”. The Demon King Irina. She is the last boss of the game, and regardless of what route is taken, she is the one who will be killed by protagonist at the end of the game. “—— Never I will accept it.” He can’t stand the fact that the Demon King, who is his favorite character, has to meet such an end! Varian, who has gained memories of his previous life, becomes extremely determined to engage in the training that he had hated. Everything he does is to lead his favorite Demon King to a happy ending who is about to die an unhappy death. In order to save the Demon King, he begins his training. He then becomes a servant of the Demon King, and goes on a rampage to save the Demon King from all kinds of disastrous situations!