By suggestion of her friends, Escha attempts to make a copy of her artificial tail but despite being a profitable opportunity, she is more interested in doing so to learn more about her late mother, who created it for her.
The members of the R&D division prepare for the arrival of an auditor to check on their work, the swords-woman Linca is spotted causing trouble around town and is put under suspicion, despite claiming innocence, until they learn the truth.
Boarding their new airship, Escha and her friends at last reach the unexplored ruins where they meet an enigmatic girl named Flameu that drives them away.
Back to the ruins, they confront Flameu and have her remember her past. Once she breaks free from the device that binds her to the ruins, they fall to the ground and Flameo departs to parts unknown thanking Escha and Logy for their help.
With their assignments done for a while, the R&D division is up for some well deserved vacation, when Wilbell appears and convinces them to accompany her on a hot springs trip near a volcano, unaware of her true intentions.
Escha always dreamed of reaching the unexplored ruins that float near her city. When their friend Threia decides to issue a request to look for a mean to reach the ruins, Escha cheers up, just to have her dreams crushed.
Escha and Logy are tasked to provide assistance to a nearby village which is on shortage of water and along the way, they befriend two travelers, Nio and Wilbell, who assist them on their quest.
Escha is tasked to find ways to improve the harvest on the local orchard, she and her friends decide to hold a contest to look for recipes to make with the discarded apples while an eating contest is held at the local restaurant.
Lucille Ernella, a specialist in medicine, arrives from central to work on the R&D division under Escha and Logy. Despite proving herself quite capable, Lucille gets in trouble when attempts to perform her duties without asking assistance.