Ruka's Drowned Wishes: A Vermonia Story

Ruka's Drowned Wishes: A Vermonia Story is a short manga, released as a sub-story for Vermonia. Its position in the timeline is overlapping that of the fourth volume.

Story
Captain Acidulous is seen, complaining about how incompetent Uro's forces are. Arussha then appears out of nowhere, saying that she knows of a troop so powerful that they can destroy entire landscapes just by thinking about it. Acidulous doubts this, but decides to send them out anyway.

We then see Naomi, Jim and Rainbow at the Aqami village. Rainbow uses the magical Rokolos to communicate with Irenu, although their discussion gets interrupted by a magic spell.