Kolulu

One day, after completing their mission on an island, the protagonists find a girl who has collapsed on the way to the cafeteria. When the protagonists try to help her, the girl replies in an unusual language, That girl was Koruru. Koruru was hungry and had fallen ill, but for some reason she left the place with her empty stomach. The protagonists, concerned, follow her and find themselves in a underground arena! And the spear she is holding in her hand is quite unique.