Well, it could be about a character named Sasori and his journey in love. Maybe it involves his relationships, his search for love, or a particular love interest. Without more context, it's hard to say exactly.
Sasori is definitely a main character in this 'sasori love story'. As for other possible main characters, it could be someone who is close to Sasori, like a friend who helps him in his love journey, or the person he falls in love with. This person could be from the same world as Sasori or a complete stranger that he meets by chance, and together they form the core of the love story.
One common theme is redemption. Since Sasori has a rather dark past, in many fanfictions, love leads him towards redemption. Another theme is the discovery of emotions. Sasori is often portrayed as cold, and love makes him explore feelings he never knew before. And the theme of sacrifice also pops up, where either Sasori or his love interest sacrifices something for the relationship.
One common theme is redemption. Sasori has done many cruel things in his past, and through the love of the reader, he might seek redemption. Another theme is acceptance. The reader accepts Sasori for who he is, including his inhuman parts, which is a powerful aspect of their relationship.
One possible sasori x reader love story could be that the reader is an artist who is fascinated by Sasori's puppet art. They first meet when the reader is exploring an old puppet workshop. Sasori is initially cold but gradually warms up as the reader shows a deep understanding of his work. Over time, they bond over their shared love for art, and Sasori finds himself falling for the reader's kind heart and unique perspective on his creations.
One popular sasori love story fanfiction is 'Sasori's Redemption in Love'. It tells a story of Sasori finding love and changing his ways. Another great one is 'Love Beyond Puppets' which explores a unique relationship with Sasori. And there's also 'Sasori's Heart of Gold in Love' which shows a softer side of him in a love story.
Another theme could be the contrast between their natures. Sakura is a healer and Sasori is a puppet - master who has caused a lot of harm. The fanfiction might explore how they bridge this gap between their different personalities and abilities and fall in love in the process. It's like two opposite poles attracting each other.
I'm not sure of specific fanfiction titles, but you could also check out Archive of Our Own (AO3). It has a large collection of fan works. Look for the Naruto section as Sasori and Sakura are from Naruto. There might be some interesting love - themed stories about them if you dig around a bit.
In this fanfiction concept, the relationship between Sasori and Sakura would be turned upside down. Sasori, known for his cruelty, would now be in a position of a father. He might try to influence Sakura's growth in his own way. Maybe he'd teach her some of his puppet - making skills or his unique combat techniques. Sakura would be in a tough situation. She has her own values and goals, but now she has to factor in her connection to Sasori. She might be conflicted between her loyalty to her friends and her new - found family bond with Sasori.
Well, Sasori's sad story has a lot to do with his transformation. He was a talented artist, but due to various circumstances in his life, like the loss of his parents at a young age. And then he was used by others. All these things piled up and made him into the cold - hearted puppet - loving Sasori we know. He couldn't find true connection with others and was trapped in his own world of puppets, which is really sad.