Eiri, a talented budding artist, works in his family's quaint antique shop. His young world is transformed after he stumbles upon a delicate Venetian glass harboring an enchanting saga. The glass is but a portal into the tragic world of a young girl named Cossette. He falls in love with this illusion that is as beautiful as she is cursed.
SpoilerHe is told by Cossette he is Marcello reborn, however, he is proven to be nothing like him in the final episode when he paints a beautiful portrait of Cossette with his own blood, killing Marcello's version.