Non-spoiler review Some warnings before you watch- It has some blood/gore There are flashing lights We follow the story of Eiri, a young man who works in an antique shop. He comes across an old Venetian glass, and sees visions of a young girl, Cossette. He falls in love with the girl, and becomes obsessed with the visions. It becomes difficult to separate reality from these vivid visions of Cossette. Eiri, bewitched by Cossette, now becomes cursed by her.It has 3 episodes, each around 30 minutes.
Though it is short, it has a satisfying plotline, and enough things to keep you from getting bored.

The anime has a beautiful soundtrack as well.