Fukushuu wo Koinegau Saikyou Yuusha wa, Yami no Chikara de Senmetsu Musou suru  

The strongest brave who craves revenge, extinguish with the power of darkness, 復讐を希う最強勇者は、闇の力で殲滅無双する, The Dark Massacre of the Vengeful Hero, 復讐を希う最強勇者は、闇の力で殲滅無双する, The Hero Who Seeks Revenge Shall Exterminate with Darkness

The strongest hero, Raul, who had defeated the demon king, should have become the savior of the world. However, his treasured companions and family were killed by power-hungry aristocrats, leading to his execution with false charges brought against him by the princess. Just before his death, Raul's heart broke into pieces. After obtaining the power of darkness, he was revived several days later in the imperial capital where flowers bloomed profusely. Unfortunately, this marked the beginning of a tragic parade that would ultimately lead to his downfall.