I want to be a hero of justice. A boy with such a mind is reincarnated as …… arrogant and villainous character! Waltz Blanche. The boy who is reincarnated as that character who is too arrogant is unable to speak in a kind tone due to strong willpower. His words are transformed into arrogance and his attitude in public is that of a villain. He is the complete opposite of the hero he longs to be. Nevertheless, Waltz has overwhelming talent. So the protagonist decides to use his power to become the hero he longs to be. Even if a bleak future awaits him, he is determined to die saving people to the very end. However, bad rumours still prevail everywhere he goes, and the only excuse he can offer is the worst possible behaviour. But he remains determined, and as he performs more and more tsundere-like good deeds, people gradually come to understand him, and he eventually grows to become a dark hero. Then, the main story begins, and the main characters, including the protagonist, are……?