It was a peaceful afternoon in the residential area of Tokyo, Tatsuya was at home, folding clothes and cleaning the dishes. His parents and younger sister, Ayaka, were all surprised by the sudden change in his behavior.
"Tatsuya, you never help with household chores. What's happened to you?" Tatsuya's mother asked, looking at him with suspicion.
"I just wanted to help out. Is that so wrong?" Tatsuya replied, trying to avoid any further questioning.
His father, on the other hand, was more than happy with the change. "It's great to see you helping around, son. I hope this continues."
Tatsuya continued with his chores, trying to ignore the curious glances from his family. However, he couldn't shake off the feeling of nervousness. He knew that he couldn't reveal his powers to anyone, but he felt a strong urge to use them for good.
Later that day, Tatsuya was walking down the street when he saw a young boy and his mother crossing the road. Suddenly, a truck came speeding towards them and Tatsuya's instincts kicked in. He ran towards the boy and his mother, pushed them to safety, and with his supernatural speed, he managed to stop the truck before it caused any harm.
The boy and his mother were shocked and grateful for Tatsuya's help. They asked for his name and address, but Tatsuya declined and told them that it was just a coincidence.
Back at home, Tatsuya was sitting on his bed, deep in thought. He realized that he couldn't keep his powers a secret forever, and he needed to find a way to use them for the betterment of society.
Tatsuya's thoughts were interrupted by his little sister, Ayaka, who came into his room. "Tatsuya, do you want to play with me?" she asked with a big smile on her face.
Tatsuya smiled back and said, "Sure, let's play."
As they played together, Tatsuya realized that he didn't have to use his powers for recognition or fame. He could use them to help others, to make a difference in the world, and that was enough for him. From that day forward, Tatsuya became known as the "Helpful Hero," saving lives and making a difference, all while keeping his powers a secret.