After learning that the island they’re on may be near Okinawa, Sengoku and his friends put a plan in motion to sail back to Japan. But before they can do that, a decision is made to check our the fourth and final tower on the island. Their journey into the depths of this mysterious structure is sure to result in many discoveries, but when they least expect it they may also find that they’re not the only ones in the building …
Chapter TitlesChapter 167: The Two DrawingsChapter 168: The Last TowerChapter 169: Inescapable BondsChapter 170: Invisible ObserverChapter 171: Mournful LieChapter 172: God's DomainChapter 173: Raika IslandChapter 174: PhotosChapter 175: The Observer's Identity
— Description from Comic Vine community (comicvine.gamespot.com).
