Corrupt politicians, mad nationalists, and other warmongering forces constantly threaten the thin veil of peace between the neighboring nations of Ostania and Westalis. Despite their plots, the famed spy and master of disguise known as "Twilight" carries out one dangerous mission after another, hoping that no child will ever have to endure the horrors of war.
In Berlint, a bustling city in Ostania, Twilight takes on the alias of "Loid Forger," a respected psychiatrist. His true objective, however, is to gather intelligence on Donovan Desmond, a reclusive, well-known politician whose son attends the prestigious Eden Academy. Enlisting the single city-hall clerk Yor Briar to pose as his wife and adopting the curious six-year-old orphan Anya as his daughter, Loid sets his real plan in motion. He intends to enroll Anya at Eden Academy, hoping she will excel there and give him the chance to meet Donovan without arousing suspicion.
Unfortunately for Loid, even a gifted man struggles to play the part of a loving father and husband. Just as Loid conceals his true identity, Yor - the underground assassin known as the "Thorn Princess" - and Anya - an esper who can read minds - have no intention of revealing their own secrets either. Although this perfect family is built on deception, the Forgers slowly come to realize that the love they feel for one another surpasses everything else.
In episode 3, Yor moves into the house; before the interview they visit a tailor and buy a dress for Yor, and they catch a thief. In episode 4, the school interview goes badly.
Auto-translated from Turkish