Spy x Family AU: either IzuSeri with their child being Anna or MikoRei with their child being Fushimi. (I remembr sending separate asks before with these two but they probably got lost so here's a combo).

I feel like Mikorei AU would turn into Fushimi doing everything and saving world peace while Mikoto and Munakata uselessly flirt with each other XD Like imagine Munakata as the top spy of the Blue kingdom, who in order to keep the peace must obtain a spouse and child. He first goes to an orphanage specially selected not to ask questions in order to find a child, all of the kids are eagerly trying to be chosen except for one gloomy kid who’s sitting in the corner focused on a puzzle. Munakata is immediately intrigued, even though the kid keeps glaring at him and telling him to go away. Fushimi doesn’t trust adults due to being used for experiments that gave him mind reading abilities. He knows right away that Munakata’s a spy and thinks it’s best not to get caught up with this person, Munakata meanwhile totally ignores all the ‘go away’ vibes that Fushimi is radiating and is like yes this will be my new adorable child. 

So now that he has the cutest most talented child Munakata is in need of a spouse. The intelligence agency had initially planned to provide him with one but was unable, so he needs to find someone who won’t ask questions or cause him any trouble. Munakata doesn’t like the idea of leading some woman on, even though he knows that he can easily charm anyone he wishes. That’s when he happens to run into Mikoto, who’s annoyed because he’s being suspected at the government office where he works as a security guard, all because he’s young and unmarried and entirely unmotivated by anything. They run into each other while Fushimi is being fitted for new clothes and the moment Fushimi sees Mikoto he’s like ‘that person’s scary, I’ll avoid him’ only to end up like accidentally running literally into Mikoto while getting a drink of water. Munakata and Mikoto immediately clash but Munakata decides this would be a splendid challenge, he will marry Mikoto and turn him into a proper member of society while also maintaining his cover.

Mikoto doesn’t like this guy at all but being taken in on suspicion of being a spy would be a problem for his real job, working as an assassin known as the Red Monster. When Munakata proposes a marriage of convenience he thinks this guy really is weird in the head but then on the other hand it’s interesting so he figures why not. Mikoto possibly regrets this decision when he finds himself constantly lectured for being a lazy and inattentive wife, he just smirks at Munakata like you’re wearing an apron so which one of us is the wife here. Fushimi meanwhile sails through his tests at the prestigious academy that the son of Munakata’s target attends, which is good because his ‘parents’ bicker through the entire interview. He doesn’t trust either of these two to solve world peace, which is why it’s a good thing that he just has to be successful with his studies (only to find himself being given a tontritus bolt immediately for fighting with the guy he was supposed to be befriending, a ‘Yata Misaki’). 

Bonus Izuseri scenario: they would be perfect. Absolutely perfect. Imagine Kusanagi as this smooth charming spy, who can talk his way into almost anything. When he adopts Anna he doesn’t think he’ll get attached to her but he’s not going to neglect her either, she’s a sweet girl and he figures the least he can do is take care of her and make sure she has a good childhood. He doesn’t think finding a wife will be easy either but then he meets Awashima, the pretty office worker who somehow doesn’t already have a boyfriend. Kusanagi figures he’s hit the jackpot, until she goes out for drinks with him and orders them both anko martinis.

Awashima is of course secretly an assassin and ridiculously strong, when they get attacked by some guys after Kusanagi he’s amazed at how well Awashima holds them off (using some martial arts she claims she learned from a correspondence course, nothing suspicious here). When Kusanagi proposes the marriage of convenience she gives him a cold look, thinking he’s some kind of smooth talker, but Kusanagi quickly explains it’s for the sake of his child and wouldn’t it help her out too, he promises he’ll respect her privacy and everything. Awashima sighs and supposes it would be for the best, she can’t have anything jeopardizing her assassin job after all. She immediately becomes attached to Anna, who’s sweet and mature and has read both their minds by now but is keeping it to herself. Anna really loves both her ‘parents’ and wants to live with them forever so she doesn’t mention her powers but does maybe do her best to nudge the two of them together, aware that they do really care for each other. They don’t need much help from her in securing world peace though because Awashima and Kusanagi are mature adults who can flirt while also doing their jobs (also please imagine Munakata as Yuri in this situation, he’s Awashima’s boss and longtime friend and he is just somewhat surprised to hear she was married, he simply wants to see if her husband is worthy of her. He intends to grill Kusanagi properly to be sure this isn’t some trick but gets distracted by being incredibly passive aggressive and petty instead, while Awashima sits to the side and busily makes everyone some anko tea).