If you want a platform where you can read and write interactive romantic stories with other people, Pirr is a great option. Pirr is an AI-powered storytelling tool that lets you create personalized romantic stories on your own or with a group. It's got four modes: Discover, Generate, Create and Publish. The Create mode is great for collaborative storytelling, letting you write with others using invitation links to co-create. The company also protects privacy with strong protections to keep your stories private.
Another good option is Novelcrafter. Although it's primarily a one-stop-shop novel writing tool, its broad range of AI-powered tools and multiple writing modes can be used for collaborative, interactive storytelling. The Codex tool serves as a central hub for tracking story details, so you can better organize and keep track of your narrative as you write. Novelcrafter offers a range of pricing tiers and a 14-day free trial, so you can try it out for solo or collaborative projects.