|Series:||AKB48 Murder Mystery|
|First Appearance:||File 5|
|Last Appearance:||File 5|
|Number of Episode|
|2 (File 5, Testimony File)|
- "When I saw Renacchi’s dying message, I was really shocked, of course. N could totally mean me. But it could be a Z rather than N, but seeing that it has the possibility to be a 4, I was kind of relieved. But if that’s so, then taking both Yuko and Mayuyu’s dying messages at face value might be dangerous, huh?"
- ―Sato Natsuki's Testimony[Testimonials and Alibis (src)]
A few days after Atsuko announced her graduation, the idol group AKB48 went to a far away island to shoot for Atsuko's final project as a member. After the first day of filming, they were told to stay and rest on the island's owner's vacation mansion. As Takamina detailed the chores to be taken care of, and checked on the members, they noticed that, besides Atsuko, Renacchi is also missing. While in the middle of searching for Rena, Nacchi and the rest of them heard from the 1st Gen members that they've already found her.