In this type of fanfiction, it might begin with Anko being assigned to a mission with Naruto. On the mission, they face many difficulties together and rely on each other for survival. This experience deepens their bond. Naruto starts to see Anko in a new light, and Anko is impressed by Naruto's growth. They fall in love and decide to get married. After getting married, they might work together to improve the village's security, with Anko teaching Naruto some of her unique combat skills and Naruto sharing his ideas for a more united village.
One possible plot could be that Naruto, after achieving great things in the village, realizes his feelings for Anko. Anko, who has always been a bit of an outsider, is initially hesitant but Naruto's persistence wins her over. They start dating secretly and then, with the support of their friends like Shikamaru and Sakura, they decide to get married. Their wedding would be a grand affair with the whole village celebrating.
Well, in a 'Naruto and Anko get married' fanfiction, perhaps it starts with Anko training Naruto in some special jutsu. During this time, they grow closer and discover a mutual attraction. As they get to know each other better, Naruto sees Anko's tough exterior but also her kind heart. They decide to get married, and Naruto's clones help with all the wedding preparations. The story could also involve some challenges from the villagers who are initially skeptical about their relationship.