輪番制で救世主を担当してきたのに、今回の俺は魔王らしい

I was supposed to be reincarnated as a Savior, but for some reason, in this life, I seem to be the Demon King!! The Savior. The existence that should defeat the Demon King and become a Hero has never once appeared in the world; they were merely a legendary existence. The six people who serve as Saviors on a rotation basis were brutally murdered by the Demon King and reincarnated, challenged and lost and were killed so many times they don even remember how many times they repeated it. Everyone thought that was their destiny, but this time, things seem different. That’s because Rudbeckia, who plays a part among the six Saviors, was reincarnated as the next Demon King. The former Savior who received an unexpected life. After struggling to reunite with comrades and discovering the truth, what awaits beyond is……