Ryuu and the Three Memorian Rings

Ryuu, a dexterous thief, attempts to steal three rings from the Louvre known as the rings of Memoria. However, while stealing them she realizes that she is not the only one after them. To her surprise the rings are haunted by a boy named Yadriel who helps her learn about the rings' actual origin and their many secrets. As she gets closer and closer to her discovery of the rings and their powers she notices someone following her.