Ep. 4: Jinrai arrives to challenge Gourai, disrupting Ao's lesson on human manners
Aired on April 25, 2017

Ao attempts to instruct the girls on proper human etiquette and social conduct. However, the training session is abruptly interrupted by the arrival of Jinrai. He immediately issues a direct challenge to Gourai, demanding a duel. This unexpected confrontation completely overturns the planned lesson, shifting the focus from social instruction to combat preparation. The narrative centers on the clash between the two characters as they prepare for the fight, leaving the girls' manners training in disarray due to the sudden and aggressive intervention.
Episodes
- Ep. 1 · Ao receives a Frame Arm Girl package and faces an unexpected visitor
- Ep. 2 · Can a Sty-ko Who Cannot Fly Be Called Sty-ko? / We Are Going to Clean
- Ep. 3 · Ao visits school with Baselard while items vanish and the Materia sisters arrive
- Ep. 4 · Jinrai arrives to challenge Gourai, disrupting Ao's lesson on human manners
- Ep. 5 · The Architect Intervenes During the Battle Between Gourai and Jinrai
- Ep. 6 · Ao attends the summer festival with Frame Arm Girls amidst Jinrai and the Materia sisters' antics
- Ep. 7 · Frame Arm Girls play hide and seek while Gourai seeks an upgrade with Bukiko's help
- Ep. 8 · The girls perform at a pep rally while Gourai opens up to Ao