The Cat With Only Eight Lives

One day, Charlie Caddel, is asked by his crush, Angelica aka Angel Barlowe, to hangout with his friend at her house. However, when he arrives, there is no memory of proof of the existence of Angel. And the next day, his best friend, Joshua has no memory of Angel either, along with the entire school. Will Charlie be able to find out what happened, or will Angel be only a fragment of his memory forever?