Chitoge reveals that she has a key that could unlock Raku's locket, but when they try, the key breaks. While Raku's locket is being repaired, Raku thinks about who might be the one he made a love promise to. Chitoge's father mentions that he recognized Kosaki from the past as the three were friends. Raku's father mentions he has a photo of the girl that Raku made a promise to ten years ago.