Nisekoi: False Love, Volume 19: Decision — Naoshi Komi

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!