15sRainy Tokyo Night Ad for Fictional AI Calm App
A 15-second vertical commercial for a fictional AI app called "MA" that promises a quiet mental pause amid busy daily life. The prompt specifies a premium Japanese live-action film look, set on rain-soaked Tokyo streets at night with an emotionally grounded, realistic tone.
いちご｜AI研究家 @NAJGAwriting
Prompt (original, unmodified)
Create a 15-second vertical 9:16 cinematic commercial for a fictional AI app called “MA”, an app that creates a quiet mental pause in busy daily life. Style: premium Japanese live-action film commercial, emotionally grounded, realistic Tokyo at night, rain-soaked streets, deep
Reproduced verbatim from the original post. Never edited or translated. Everything outside this block is our own commentary.
How this prompt compares
The 15s duration is not arbitrary: 71% of the prompts in this library that state a duration ask for exactly 15 seconds — Seedance 2.0 accepts clips up to 15 seconds, so 15s is the model's ceiling and the most common choice.
