Rika Yamaguchi (32), who works at a record company, is called out by her ex-boyfriend on her birthday for dinner, which leads to sex. When she returns home with mixed feelings, she finds a middle-aged woman resembling an Osaka auntie in her house! To Rika's surprise, the auntie accurately predicts what she's done that day and starts lecturing her. The auntie's true identity is... none other than Rika herself 20 years in the future! Furthermore, Rika is told that if she continues on this path, she will die in the form of the auntie. That is something she absolutely, positively does not want! Thus begins Rika (32) and the auntie (52), a strange duo of themselves, as they re-evaluate their life choices!