Youngor: Trustworthy

On the way to visit her grandmother during the summer vacation, the junior high school girl Mitsuye met Ranye, a stranger from the other side of the world, and the boy Hatsumi. Mitsuye heard the fate of loneliness from his singing. He said that on the day he came here in search of a lost melody from ancient times, he saw Mitsuha standing in the light and this man. At the same time, the military's secret experimental subjects escaped, and many citizens lost contact in the town one after another. As the secrets leading to the endless treasure Younger were slowly revealed, they gradually followed the guidance of the legendary melody that the shepherd boy had been pursuing, and started the journey of the summer battle to save the world in Younger on the other side.