Good story mode prompts give a fictional character a setting, a shared objective, and a tone for the next scene.
Use the setting-objective-tone pattern
A simple pattern is setting, objective, and tone. For example: in a floating market, help a nervous inventor present a gadget, with a hopeful and comedic tone.
Let the character make choices
Story mode feels more alive when the fictional character can suggest plans, ask questions, or react to surprises instead of only waiting for instructions.
Keep scenes welcoming
Choose prompts that support adventure, friendship, creativity, and character growth. This keeps sessions SFW while still giving users plenty of narrative variety.