Is This a Fake Love?!
Raku's still hung up over the girl he made a promise with ten years ago, keeping a pendant around his neck as a memento. The girl, in turn, holds the key that opens the pendant. To Raku's surprise, he discovers that three girls have keys from a promise they also made ten years ago - Chitoge, his current crush Onodera, and the police chief's daughter Marika!