Perhaps a time - travel fanfic where Sakura is sent back in time and accidentally becomes involved with the early days of the Akatsuki. She tries to prevent some of the more tragic events that are related to the group, and in the process, she has to deal with the younger versions of the Akatsuki members who are not as set in their ways yet.
One idea could be a story where Sakura, with her medical skills, is captured by the Akatsuki. Instead of being a prisoner, she slowly starts to understand their motives and forms an unexpected bond with some of the members, like Itachi. He sees her as a symbol of hope in a way, and she tries to convince him to leave the Akatsuki.
One idea could be Sakura being sent on a mission to infiltrate the Akatsuki. She has to pretend to be a new recruit while secretly gathering information for Konoha. Another could be a story where Sakura discovers a long - lost connection between her family and a member of the Akatsuki, which changes her perspective on them. Maybe she could end up befriending some Akatsuki members who have a change of heart and want to abandon their evil ways, and together they try to make amends for their past actions.
I'm not sure if there is a specific 'sakura x akatsuki lemon fanfic' available. You could try searching on some popular fanfic websites like Archive of Our Own or Fanfiction.net.
One idea could be that Sakura Akatsuki discovers a magical lemon tree in a hidden garden. The lemons from this tree have special powers that can heal any wound. She then has to protect the tree from those who would use its power for evil. Another could be that Sakura Akatsuki is on a journey and she meets a strange character who is always surrounded by lemons. This character gives her a lemon that transports her to a different dimension where she has to face various challenges to get back home.
A possible plot could be that Sakura is on a mission and crosses paths with the Akatsuki. One of the Akatsuki members is intrigued by her strength and beauty. As they interact more, a relationship forms. In the context of a 'lemon' fanfic, there could be scenes where they share intimate moments, perhaps in a hidden lair or during a time when they are away from the chaos of their respective worlds.
One idea could be Sakura infiltrating the Akatsuki to gather information for the Hidden Leaf. She might start to understand the motives of some Akatsuki members and question her own village's view of them.
One popular 'akatsuki sakura fanfic' story could be about Sakura joining the Akatsuki and having to prove herself among the group of outlaws. In this kind of fanfic, she might use her medical skills in unique ways to help the Akatsuki members, while also facing challenges due to her previous association with Konoha.
One popular sakura akatsuki fanfic might be the one where Sakura joins the Akatsuki on a mission of self - discovery. In this story, she has to prove herself to the members.
When writing interactions between Sakura and Akatsuki members, you have to think about the emotional aspect. For instance, if Sakura meets Deidara, she might be frustrated by his explosive and unpredictable nature. But at the same time, she could see a bit of herself in his passion for his art (her passion for medicine). You can build on this by having them argue about the value of their respective crafts. Also, for interactions with Obito, given his complex backstory, Sakura could be empathetic towards him once she discovers his past, which could lead to a very emotional and deep interaction.
There are akatsuki x oc fanfics where the OC is a spy. In this kind of story, the OC has to infiltrate the Akatsuki while hiding their true identity. The OC might start to have second thoughts as they get to know the members on a more personal level, and this internal conflict makes for an interesting plot. They may end up changing sides or finding a middle ground.
The OC could be a former assassin who has given up his old ways. He crosses paths with Yona's group when they are being hunted by a powerful enemy. He uses his skills to protect them. Yona is hesitant at first to trust him, but as she sees his genuine remorse for his past actions and his dedication to their cause, she accepts him into the group. Together, they face the challenges of not only the external threats but also the internal struggles within the group as they adjust to having an ex - assassin among them.