I didnt see it posted, but Ami doesnt really have a boyfriend
ive been playing with Mami as my leader, and the storyline is that Ami and Mami are competing with each other to see who is more "motemote" or popular with boys. This is partially the reason Mami decides to debut against her sister. As the story goes on, Mami still feels inferior, especially after losing to RK, but then once you get the nomination for IA Mami feels like shes won the motemote battle. This is a cute scene where Ami acts upset and runs off saying she'll be back! (although she actually runs off yellling COMING SOON!) Later Mami reveals to you that Ami has a boyfriend and that she has now lost. This leads Mami to hold a press conference announcing their withdrawal from IA. Ami reveals to you that she made up the story about her boyfriend because she didn't want to lose to Mami, so now you have to run over and stop Mami from making an announcement. Mami makes the announcement and says that it looks like they cant win against Jupiter, and that this is pretty much the end of Futami Mami. But then she reveals that she will become the New Mami and try even harder to win. She then runs away laughing, leaving the reporters very confused.
Im not done with the game completely, but im pretty sure im going to get a bad ending. Thats the gist of her story, although it might be a little inaccurate because I skip a lot of the text, takes so long to read...