Fireworks Festival of Feelings / Let's Go to School 2
Ao prepares to go to a fireworks festival but is met with opposition from Jinrai, who believes she shouldn't wear underwear under her kimono. Although the resulting commotion leads Ao to miss the festival, she gets to watch them on the roof with the F.A. Girls. Later, as Ao attempts to finish her summer homework at the last minute, the F.A. Girls are tasked with fetching her notebook from school at night, providing Baselord and the Materia Sisters with an opportunity to scare them by pretending to be ghosts. However, the girls soon become the target of a haunted pair of nippers, which manages to fulfil its goal by snipping a leftover fragment off of Gourai's armor.
Aired 09/05/2017EP 6 - Fireworks Festival of Feelings / Let's Go to School 2

Frame Arms Girl
The story begins when Ao opens a package that arrives at her doorstep. Inside the package is Gourai, a Frame Arms Girl: a small robot capable of independent movement. Gourai is a newly-developed prototype: a Frame Arms Girl equipped with an "Artificial Self," an advanced AI that gives her a personality. Ao is the only one that has activated her. Gourai begins to gather both battle data and emotions, starting a day-to-day life with Ao, who knows nothing about Frame Arms Girls.
(Source: Anime News Network)