Fabulous Adventurer

One day, Van Crain, the third son of an earl's family, suddenly recovers memories of his previous life and remembers that he was what people call an "onee" in his past life. From his childhood, he was thoroughly trained and mastered a school of killing martial arts that was a one-hit certain kill technique by his father and grandfather. However, because it was a lethal fighting style, he couldn't participate in tournaments or competitions. Additionally, due to his large physique, people feared him, but since no one ever picked fights with him, it never saw the light of day even as a self-defense tool. This is a story about how he, through various twists and turns, becomes an adventurer. This is my debut work.