Sorry, I made a mistake on the pool name. It's actually called 'Original Manga', and I don't think that it's an exact 'Idolm@ster' comic. It may be inspired by it, but the pixiv page doesn't say so.
So, since the pixiv comic pool title is 'Original Manga', I've made the name 'Riyo - Original Manga', since having only 'Original Manga' as a title is too ambiguous.
Oh really...? Hmm... That's strange, no, wait.
That could be because.......Strange...Erm... You are...I am the you that turned 18.It seems that you do not have any brilliance of a idol...