Combining virtual environments with reality has emerged as a significant trend in virtual reality (VR) development. However, the problem of bridging the gap between virtual and reality in VR narrative experiences remains unresolved, limiting the potential for seamless transitions in highly immersive content. Based on previous literature, this paper proposes design methods for naturally crossing the virtual and reality in VR narratives. We designed an immersive narrative experience “Beyond Realities”, and implemented four cross-reality interactions in it: Portal Passthrough, Bystander Avatar, Object Passthrough, and Virtual Guidance. We conducted a preliminary study (n=11) to explore the impacts of cross-reality interactions on narrative comprehension and user experience. The qualitative results show that contextual cross-reality interactions (e.g., Bystander Avatar, Object Passthrough) could enhance the perception of the VR experience and maintain its consistency. Finally, we proposed design recommendations in the aspects of narrative content, interaction metaphors, and sensory cues, which contribute to understanding and improving the interaction for seamless switching between the real and virtual worlds.