Energetic K-Drama Cast in a Vibrant Promotional Poster

A vibrant, colorful K-drama promotional poster featuring four young Korean actors in a cheerful, energetic group pose against a bright white and light blue gradient background with a clear blue sky at the top.
In the foreground, a young woman with long dark hair, wearing a white turtleneck top under a white sleeveless dress with red floral patterns, is smiling widely with her mouth open and pointing directly at the camera with her right index finger.
Behind her and to the left, a woman with long reddish-brown hair in a purple blazer is smiling and pointing upward with her right index finger.
In the center back, a man with dark hair wearing a dark blue jacket over an orange shirt is smiling with his right fist raised in the air.
On the right, a man with short dark hair in a light blue knit sweater is smiling brightly and making a thumbs-up gesture with his right hand.
The overall composition is bright, fun, and youthful with clean studio lighting, high resolution, and a promotional poster style typical of Korean television dramas.