The Ocean Chose Me

When the world floods into an endless ocean overnight, ordinary survivor Jack Harper awakens a Survival Choice System that pinpoints supplies and dangers around him. Starting from a tiny raft, he gathers weapons, builds a sailboat, rescues the campus queen Emma and nurse Lily, and fights off pirates and sea monsters. His greatest prize is the Tide Orb, a Sea God's treasure that commands seawater. When a colossal tsunami threatens the island base Sea Haven and its thousand survivors, Jack splits the waves with divine power, earns the island, and crowns himself king of this new ocean world.