While you did admit the costumes proposed are all exceptionally crafted, to the point anyone wearing them would look like the real thing unless you carefully study the wearers, something was missing.
Your love and yourself were currently searching for something more, a costume with a twist, something really unique. Since costumes of this quality could hardly be mass produced, you deduced that the costumes must be handcrafted and what was exposed was only examples of what could be done. So walking toward the counter you ask the bored young man at the register if they would do a special command, or failing that if you could buy the pieces needed from the store and make the costumes yourselves, knowing the result wouldn't be as good.
"Er… Let me call the boss" was your answer.
A few minutes later a very seductive woman with unnaturally black hairs, a pale skin and yellow eyes (probably contacts, you think) came wearing a stunning witch costume. "Bonjour, I am Eris, owner of ‘the Chaostume boutique’. I have heard you two have some… Peculiar desires."
"Yes. You see, we want to add a ‘twist’ to our costumes."
"A twist?"
"Yes. For example, imagine we want succubus costume. It can't be just that, that's to easy, to common. You could make it… I don't know… Let's say a succubus with the heart, mind, tastes and mannerisms of an archangel, it could even dress like one.
And then the other could be her husband, a prank loving, sex obsessed archangel that's somehow still on god's side! I could even see him wearing what would be expected of an incubus rather than his own kind!"
Eris wasn't sure it was in her interest to do so, it could piss of god and his archangels. On the other side, she couldn't let clients go without a costume, her pride wouldn't let her do so. "I think I can do something for you. I should even be able to do it right now if you have the time."
Giddy and exited, the two of you followed the shop owner, who added "You know, while I love your archangel concept, I think your succubus one is still lacking. I still have leftovers from a yuki-ona costume I could use to make it look like your succubus as ice powers. I could even make her have ice-horns!"
Once you arrived in the back shop, she made the two of you sit on stools and put you in trance and called some of her staff to help her. "So boss, will you really change her into an angelic succubus and him into a sexually depraved archangel?"
"Don't be stupid Simon, he will become the demoness with a broom up her ass and she will become the charming husband."
— – - – —
When you woke up you were outside, just in front of where the magical "Chaostume boutique" used to be, the store itself nowhere to be found.
One of you had become an honest to god, real-life succubus, her horns and the tip of her talons looking to be made of ice, ice-blue cat-like eyes, and a strangely human skin-tone. She could also feel wings you knew to be bat-like on her back, a long tail, and two big toes by foot, making said foots like they were big cloven hooves partially made of ice. She also knew she looked like a tomboy of Japanese decent, and that she was wearing an armor of divine origin and an alliance on her ring finger.
The other looked like a scantily clad and heavily tattooed archangel, with surprisingly white wings. He was so sexy any (human) woman seeing him would instantly fall for him, and sported his own alliance on his own ring finger. He also had a big fork for divine weapon in one hand, and a paper left there by Eris in the other.
"Er… Love? You aren't going to like what said this paper. ‘I loved the challenge you gave me, so I gave you two a parting gift. The demoness is now expecting not one but two babies. Yours, of course. Take care!’"