Restarting? – Love Live!School idol festival Review

This game is super cool but I was wondering: how do you restart it? I downloaded this game a while back then deleted it in hopes that I could start it completely over again when I redownloaded it. It wouldn’t let me. I went to the help website but still couldn’t find an answer. Could someone please tell me how? -The Ultimate Fangirl (AKA UltFangirl in the game.)
Review by Allison R. Patterson on Love Live!School idol festival.