AKB0048, the most popular idol group in the universe, was in the middle of a concert on Lancaster which is Nagisa's home town, It has been three years since their last concert on this planet but sadly the DES is still in control. Every single trainee of the 77th generation has become successors.
during the concert, a DES solder was getting ready to do battle against the 0048 members. His 7 year old daughter Riku, who has never experienced any form of entertainment before has decided to tag along with her dad to see what he does since she had no school that day and she might become a solder herself someday which is what her dad wishes. "Hey daddy, Who is AKB0048 and why does the DES have to try to hurt them?' Riku asked. "All you need to know is they are the DES's enemy Riku. Please do not become one of them" Riku's father said getting his gun out. "Oh, ok dad" Riku said.
As Riku and her dad came closer to the concert, AKB0048's music started getting louder and louder. "What is that sound Daddy?' Riku asked. "It's called music. It is something that you or anyone should never hear' Riku's dad said. "why? it sounds cool" Riku said happily. "Well enjoy it will it last Riku" Riku's father said.
Riku and her father arrived at a hidden area near the stage where AKB0048 can not see them but they can see 0048. Riku's father started shooting at the members. Riku on the other hand wasn't paying attention to her dad but to the concert.
"This is so amazing" Riku thought watching the concert. Riku was amazed by everything that was happening on the stage. The cute outfits, the idols floating on platforms, the flashing lights, and their microphones turning into lazar sticks.
Yuko, One of 0048's current members, found Riku and her father in their hiding spot. Yuko charged toward Riku's father and attacked him before he could shoot again. Luckily he wasn't seriously injured. He was just knocked of his feet. Yuko noticed Riku who was just standing there then gave Riku a smile and waved before getting back to performing. "She looks so cool" Riku thought.
"Riku! are you ok?" Riku's father asked after a quick recovery. "Yeah, I'm fine. What about you?" Riku asked. "You don't need to worry about me. Your safety is more important" Riku's dad said.
After yet another successful concert by AKB0048 on Lancaster, and another failed attempt by the DES, Riku slowly developed a love for music, entertainment, idols, singing, and dancing over the years after that day with her father at the concert. However, even though Riku's love for 0048 grew, so did the DES's laws and number of solders. Every planet except for Akibastar has a strict entertainment ban. No one can leave their planets unless their reason doesn't involve any type of entertainment. Even if their reason doesn't involve entertainment, a DES solder is sent with that person to watch them.
For some people who never lose hope, They have found some way to enjoy entertainment without the DES catching them. For those who have lost hope, They just gave up. Riku is one of the people who still have hope and dreams that someday she will become a member of AKB0048.