Mujin Wakusei Survive EP39 - Why Such a Thing

Heading for the continent once more, the children have realized that something happened to Luna on the island. Chako scans Luna and discovers nanomachines in her bloodstream, which were the reason for her quick healing. She scans the rest of the children as well, but only Adam has them too, which explains why Luna and Adam are able to communicate, why Luna could hear the mysterious voice, and why she could open the door to the ruins. Luna is extremely concerned that she has nanomachines, but tries to behave as normal in front of the other children. However, they can tell that it's just an act, and after three days, they plan a cheer-up-Luna surprise party.

While Luna spends the day sleeping, Howard tries to catch a fish for a main dish, and the rest of the children prepare the deck for the party. Howard is having no success, but as Chako comes to check on him, an enormous fish suddenly bites his line, dragging Howard into the water. Kaoru stops the ship, and then kills the fish with a spear. After sunset, Luna comes up on deck to start her shift, and the children all spring the surprise party on her. They have a meal prepared for her, then put on a play written by Sharla.

The next morning, Howard, standing watch in the crow's nest, sights land. They've arrived at the continent.