This sounds like the perfect setup for a "reincarnation" or "isekai" story. Here’s a quick guide on how to handle that first chapter where your protagonist suddenly remembers who they were. 1. The Trigger
High-pitched ringing or a blur of images (subway trains, office lights, a hospital bed). 1 : I Recalled the Memories of My Past Life...
Feeling the grief of a previous death while simultaneously feeling the small, young body they are currently in. 3. The "Wait, Where Am I?" Moment This sounds like the perfect setup for a