Amaku Yasashii Sekai de Ikiru ni wa  

To Live in a Sweet and Friendly World, 甘く優しい世界で生きるには

Doyle von Agnis was a young man who had received many titles throughout his life, such as "Grandson of the Flame Spear Hero," "Son of the Thunder Spear Hero," and "Childhood Friend of the Crown Prince." At 15 years old, he believed that he would succeed and save the world. However, an encounter with an adventurer revealed a truth that shattered his reason for existence. As a result, Doyle began living a life of vice, using his family status to dominate others. One day, while suffering from a mysterious illness, Doyle had a sudden revelation that forced him to confront reality.