Lovestruck

Ah Pandora Hearts? It's about a child being thrown into the abyss by a bunch of people, claiming that it is his sin. In the abyss, he met this girl called Alice who lost her memories and they managed to get out of the abyss by forming a contract. After that, they work together with some guys from some organization to find out about this abyss thingie - why the boy's sin is, Alice's ...