Fireball takes place during the war between humans and robots. There is no real story, just individual episode skits.

Third season of Yatogame-chan Kansatsu Nikki.

The Shi siblings have a lot on their plates, such as needing to stay frugal, passing their exams, and constantly dealing with each others' antics. Older brother Fen's frivolous demeanor often gets on his younger sister Miao's nerves, leading to physical but comedic altercations. Fortunately, their friends are always around to offer a helping hand. Kai Xin is Fen's well-meaning best friend who rivals Fen's absentmindedness but makes up for it with his athleticism. Miao, on the other hand, is often accompanied by her bubbly companion Miaomiao. The most recent addition to the group is Wan Sui, who is desperate to conceal his wealth but remains tirelessly loyal to his peers—sometimes roping his younger brother Xing into their excursions. Sometimes, the friends' roundabout means of problem-solving backfire. However, no predicament is going to prevent them from discovering how fun high school life can be.

Okuto Nakamura is a timid and gloomy-looking student who cherishes only two things in this world: his pet octopus and his kind-hearted classmate, Aiki Hirose. Ever since the school entrance ceremony, Nakamura has admired his jovial classmate, albeit from a distance due to his poor social skills. After mustering up all the courage within him, he finally decides to talk to Hirose. During this first attempt to make contact, an instinctive mistake turns the idea of friendship into a distant dream, as he creates a hilarious impression on his crush. At school, students are expected to cooperate on numerous activities together, meaning Nakamura gets to spend extra time with Hirose. Given these opportunities, can he successfully redeem himself and accomplish his goal of becoming good friends with Hirose?