Dark Kamen Rider Transformation

Help me generate a transformation video: Keep the face completely consistent, do not change facial features or face shape, and do not beautify.
Style reference: Kamen Rider BLACK SUN, realistic and dark, bio-tech and alien technology feel, oppressive and heavy.
Pre-transformation look: Black leather trench coat + black shirt, bangs covering the forehead, no forehead visible, gloomy and steady.
Belt: Reference image, alien energy core, no toy-like feel.
Scene: Overcast outdoor empty lot, grey-blue sky, windy.