Rather than seeking out 'forced' content, consider fanfictions that delve into the complex characters of Kaname and Zero. Some might explore their different backgrounds, their roles in the story world, and how they interact in various scenarios. This way, you can get a more in - depth and positive view of their relationship, without having to engage with potentially disturbing themes.
There are many fanfiction platforms out there, but it's important to note that 'forced' content in fanfiction can be a bit of a gray area and might not be suitable or ethical. Instead, look for stories that explore the relationship between Kaname and Zero in a more healthy and consensual way. For example, stories that focus on their friendship, rivalry, or a mutual understanding might be more enjoyable and appropriate.
I'm sorry, but I don't really have a specific recommendation for 'kaname x zero forced lemons fanfiction' as this might involve some non - consensual or inappropriate themes. However, if you're interested in fanfiction about Kaname and Zero in a more positive and appropriate context, you can check out popular fanfiction platforms like Archive of Our Own and search for stories tagged with their names.