Koro-sensei reminisces about his first meeting with Karasuma, where they first butted heads and fought against each other, ultimately coming to respect one another. However, Karasuma eventually points out their actual meeting wasn't nearly as eventful.

Catian Eris is now on a mission to learn about Earth games and how they are played, but she seems to think that bets have to be placed every time. And while some bets are material items, eventually the Catians learn about betting items of clothing...

Those incompetent aliens are still plotting to conquer the Earth! The only obstacle in their path is the giant, feminine robot ARIEL! But the young pilots have lives of their own... When Kazumi receives a mysterious love letter from a secret admirer, should she cancel her first date just to save the Earth?

Akari Mizunashi dreams of life after attaining her goal of becoming a Prima Undine, but upon waking realizes that she might not actually have the confidence to run Aria Company on her own. Wary of the future, she seeks advice from her mentor Alicia Florence—one of the three great "Water Fairies" of Neo-Venezia. Much to Akari's surprise, Alicia reveals her own struggles of the past, but also shares the steps she took in overcoming her self-doubt of running the company and taking on an apprentice. Finding solace in her teacher's words, Akari prepares to embrace whatever trials she must overcome on her path toward achieving her dreams.