I Became the Center of an Idol Girl Group

One moment later, I'm a member of a Japanese idol girl group?

Standing before you now is

The angel-faced, devil-hearted vessel of all the world's negativity, a musical genius, a brilliant piano arranger, fluent in three and a half languages, a petite, proud idol, the divinely chosen beauty, Kenmochi Mio!

(Please don't associate this book with any real-life girl group. I'm not a dedicated fan of girl groups, and I don't know their rules and such. Don't project real people onto the characters either. If you're the type to nitpick, this isn't for you.)

(Features a protagonist who plagiarizes works from another world.)

(The character settings draw on Nogizaka. The author is a fan too, but was afraid of getting criticized for not writing it well, so created a separate fictional world. This is a self-contained project.)

(From a novice author who isn't very good at writing introductions.)