In the cyber city Tom Sawyer, society revolves around earning Love, akin to receiving likes on social media. Citizens of this augmented reality exchange Love for public services and appearance-changing avatars via the Decoration Customizer, also known as Deco, a hologram device implanted in an individual's eyes from early childhood. Under the government's careful management, the people of Tom Sawyer live a peaceful existence, outside the occasional appearance of Phantom Zero, a mysterious criminal who brings all Love to zero within their vicinity. Berry, a mischievous girl fascinated by Phantom Zero, lives comfortably in the system of Tom Sawyer until her Deco malfunctions, enabling her to see a camouflaged prankster named Hack. Believing Hack to be Phantom Zero, Berry chases after the suspect and, in the process, begins to uncover society's most well-kept secrets. As it turns out, Hack is not the only person living outside the system's rules—and the vibrant colors of Tom Sawyer hide a darker nature.

Extra episodes of Yuru Yuri Nachuyachumi! Summer vacation is drawing to a close, but the Amusement Club members make the most of the last days. Between outdoor activities in the sun, reminiscing on their recent camping trip, and a sleepover, the members of the Amusement Club, and their classmates in the student council, continue to make summer memories.

Even during summer break, the Amusement Club lives up to its name! When Akari Akaza, Kyouko Toshinou, Chinatsu Yoshikawa, and Yui Funami find a camping tent, they decide to put it to good use by spending the weekend outside in the mountains. When some student council members catch wind of this, they are invited to come along as well. After a very long journey, the group arrives at their destination and is ready to make the most of their trip. They engage in classic camping activities, such as outdoor cooking and tests of courage, and finish it all off with a visit to the hot springs. An extravagant trip like this doesn't happen every day, but the Amusement Club is sure to savor each moment.

Akari Akaza, Chinatsu Yoshikawa, Kyouko Toshinou, and Yui Funami return to commemorate an exciting occasion! Despite their initial bizarre celebration ideas, they decide to hold a party at their Amusement Club room. With the help of friends from the Student Council, they start preparing for the big day—with a surprise planned for a special someone. Join the girls as they work together to create an enjoyable and memorable party, all the while interacting with one another with their cute and unique quirks.