Nisekoi: false love. Volume 19, Decision

Summary/Review: "When the missing pages from the storybook that explain the origin of the keys and pendant surface, it seems like Kosaki might be the girl Raku made a promise with...but is that a sure thing? The answer is still unclear when Haru tricks Raku and Kosaki into going on a Christmas Eve date. And just when things are going well, Raku's pendant goes missing!"--Amazon.com