何なの、この花火？

Four fireworks were launched into the night sky, displaying the following characters at their centers—from left to right: "B," "S," "K," and "T.". The girl on the left looks up at the fireworks, lost in thought and looking puzzled. Blonde girl with an embarrassed expression, Adorable fox ears, Blonde hair, Golden eyes, Dark Gray tank top, shorts, anime illustration, great quality, best quality