Traveling Around the World with a Waste System

On an ordinary day, the protagonist wakes up suddenly and finds that he has traveled through time. The family he traveled to is still rich, and his parents are loving. He thought he could just lie down and enjoy the life of the rich second generation, but suddenly a melon-eating system descended from the sky, and big melons pounced on him one after another. So, the protagonist led everyone to eat melon happily. Certain groups of people can hear the heroine's voice, but people who have ill intentions towards the heroine or whose merit is too low cannot hear the heroine's voice.