[December 26] Update: Now with pictorial proof that this is real.
Original story: Stop the presses! Atelier Meruru Plus is real! 7netshopping didn’t make a mistake in listing it on their site!
According to this week’s issue of Famitsu Weekly, one of the new costumes for Meruru added in Atelier Meruru Plus for PlayStation Vita is that of Rorona’s.