第12話: 千棘と楽は幼少時の約束について語り、ロケットに鍵を試す

Chitoge tells Raku about the boy she made a promise with ten years ago. Raku admits that he, too, made a promise with a girl ten years ago. They decide to try and see if Chitoge's key would open up Raku's locket. But… (Source: Aniplex USA)

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