Create a bright, ultra-saturated anime YouTube-style promotional thumbnail for {argument name="brand name" default="Sousaku AI"}, in a magical-girl music theme. The scene shows exactly 2 cute brown-haired magical girls sitting side by side in the center, both smiling with eyes closed and sharing wired earphones while listening to music from exactly 1 smartphone placed between them; the phone screen displays a colorful equalizer with playback controls. The left girl wears a yellow-and-white frilly magical-girl dress with small wing-like accents, star decorations, yellow bows, and a tiny banana-
