One great Niccolo x Sasha fanfic could be 'A Culinary Bond'. In this fic, Niccolo's cooking skills are used to bring him closer to Sasha. Their relationship develops as he creates special dishes just for her. Another might be 'Under the Stars', where they have a chance encounter while stargazing and start to realize their feelings for each other.
You can start by looking on fanfiction.net. It has a large collection of fanfics from various fandoms, and there's a good chance you'll find some Niccolo x Sasha ones there. Another option is Archive of Our Own (AO3). It's known for its wide range of fan - created content and has a great tagging system to help you find exactly what you're looking for.
Since I have no prior knowledge of the 'chito neri love story', it could be anything. It might be a modern - day love story where they met through social media. Chito could have been attracted to Neri's pictures or posts at first. Then they started chatting and found out that they had a deep connection. Maybe they overcame some obstacles together, like distance or family disapproval, and their love grew stronger over time.
The 'Chito and Neri love story' could potentially have a variety of elements. Perhaps Chito was initially shy and Neri was the more outgoing one who took the first step to get to know Chito. As they spent more time together, they discovered new things about each other. They might have shared some special moments, like going on a picnic in a beautiful park or having a long conversation under the stars. And as their relationship grew, they became more committed to each other, facing the world as a couple and building a future together.
I'm not sure about the exact most memorable moments. But perhaps their wedding day was one of the most memorable. It's a big celebration of their love and commitment to each other.