Just as Luluka is settling into the CUREtto Detective Agency, Goemon barges in. Unable to accept her departure from the Phantom Thieves' Guild, he generates a trick maze to test her skills. Countless doors appear, all leading to other worlds, and who appears from behind those doors...?

Anna and the others recover a wooden box that was stolen by the Phantom Thieves' Guild and take it to the police for help with finding the owner. Shiruku Ieiri is there as Police Chief for a day, and helps put out a call for the owner, but three people arrive, all claiming to own the item.

Kurea and Luluka begin attending high school at Minato Mirai Academy. Their new classmates try striking up a conversation with Luluka but she's unable to respond well. Just then, she notices a love letter on the floor of the classroom.