再臨勇者の復讐譚　～失望しました、勇者やめて元魔王と組みます～ (Associated Names)

High school student Amatsuki Iori was summoned to a different world to fight as a brave of salvation, but whilst he was trying to save the world, he ends up being killed by the companions whom he wholeheartly believed in. It was then, when Iori thought that he already died, he came to his senses…