My little sister: Prologue

Synopsis Suhan, who goes to high school, is frustrated because he can't get along with his younger sister Sunmi. One day, he went to his friend Jinyong's house and saw Jinyong get along very well with his sister. To the envious Suhan, Jinyong pulls out a small stone, saying, 'I was never on good terms with my sister either, but this helped us get along.' The stone had the mysterious power to chan…