Island of Stars and Chains

Read manhwa Island of Stars and Chains / 별과 사슬이 뜨는 섬
Gi Seunghyun always dreamed of becoming a Hunter, but he is plagued by despair due to his lack of ability. Then one day, his older sister, Gi Sohyun, awakens from a 12-year coma. Just as they begin to reunite, the siblings find themselves caught in an unfathomable, shocking event.