Perhaps the OC is from another village on a diplomatic mission. Ino is assigned to show the OC around Konoha. At first, they have some misunderstandings due to their different village cultures, but as they get to know each other better, they realize they have a lot in common and fall in love.
First, you need to develop your OC well. Give them a unique backstory, personality traits, and goals. For example, if your OC has a troubled past, it can add depth to their relationship with Ino. Then, focus on the interaction between them. Use dialogue to show their chemistry. Don't rush the relationship; let it develop gradually.
One idea could be a fanfic where Ino Yamanaka uses her mind - transfer jutsu in a completely new and unexpected way, like transferring her consciousness into an animal to gather intelligence for the Hidden Leaf. Another could be a story about her opening a flower shop that also serves as a front for a secret shinobi information exchange.
Perhaps a fanfiction where Ino has a premonition about Naruto's future. She tries to change the course of events, but in doing so, she accidentally puts Naruto in even more danger. It becomes a race against time for Ino to correct her mistake and protect Naruto while also learning that some things are meant to happen and can't be easily changed.
In a fanfiction, their teamwork could be extraordinary. Ino could use her mind - transfer jutsu to share information with Naruto during a battle. Naruto, being the powerful ninja he is, could then act on that information quickly. For instance, if they are facing an enemy with hidden traps, Ino could transfer the knowledge of the trap locations to Naruto, and he could use his speed and strength to avoid them and attack the enemy from a safe position.
A lot of Ino Yamanaka fanfictions focus on her role in the Hidden Leaf Village. This includes her participation in village - wide events, her loyalty to the village, and how she helps in protecting it. Also, her rivalry - turned - friendship with Sakura is a popular theme that many fanfictions play around with.
Ino might also time travel to a time when the Yamanaka clan was just starting out. She could learn ancient Yamanaka techniques that have been lost over time. This would not only make her more powerful but also help her bring back some of the clan's forgotten heritage and status in the ninja world.
One popular ino yamanaka x sasuke fanfic could be 'The Unlikely Bond'. It explores their relationship in a new and interesting way, perhaps with Ino helping Sasuke deal with his past traumas while also developing romantic feelings for each other.
One interesting plot idea could be that Naruto and Ino travel back to the time when the Uchiha clan was still intact. They could try to prevent the massacre from happening. Naruto, with his knowledge of future events and his strong will, might try to convince the clan leaders and the village elders to find a different solution to the conflict. Ino, with her mind - related jutsu, could help in communicating with the Uchiha members on a deeper level to ease the tensions.
One idea could be a story where Sakura and Ino team up for a difficult medical mission in a far - off land. They have to overcome their differences and use their combined skills in medicine and combat to save the villagers there.
I'm not sure specifically as 'forced lemon' fanfiction involves inappropriate and non - consensual themes which are not acceptable in a proper fanfiction context. It's better to focus on positive and consensual fan - created works related to Ino Yamanaka.