12화: 치토게와 라쿠는 어린 시절의 약속을 이야기하고 자물쇠에 열쇠를 대본다

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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