He May Not Remember Me, but I Remember Him

After having a rather unsettling and yet realistic dream, Prima feels the need to investigate Teatro Tammaro with Tonio. The reason why is that she may know who they were before they were Vocaloids. Could it be true that Prima was Primrose Bianchi (a popular opera singer and teacher) and Tonio was her dear student (Antonello Bellomi)? It seems likely...