Good evening, writer. I just wanted to say that I love the overall context of the story. Over the years, I've only found one seduction system story set in the world of Naruto. As you can see, this type of fanfic is in high demand. It shows in the views your story receives. I wanted to share some recommendations for your story.
1. I recommend giving your character a name. If it has a special meaning, even better. For example: Hikari means light. (You could make her name have something to do with her main personality. In this case, you could consider the protagonist as a kind of light for others.)
2. Seduction is equivalent to intelligence. That is, only an intelligent woman who knows her target, with the ability to act and adapt to the personality of the man she is trying to seduce, can succeed. In other words, the protagonist must be intelligent and careful with her actions. Ultimately, she will have to deceive a shinobi, an expert in the art of deception.
3. I don't expect the protagonist to be promiscuous, but she can't behave like a virginal saint either. With characters like Kakashi, there comes a time when you have to be direct about what you want. It's okay to toy with him, make him uncomfortable, etc., but making things clear ("that the protagonist loves him") is fine so the target knows how you feel.
4. I'm sharing the fanfic I mentioned at the beginning. It's very good, in fact, the best. It will be very useful; it has the kind of protagonist you'd expect from a seduction system. There's also a manwua, where the protagonist also seduces and deceives. It doesn't have a system, but it's very good.