character: hatsune_miku, A full body shot with a light low-angle, diagonal composition of Hatsune Miku jumping energetically at a sunny poolside, occupying 80% of the vertical poster frame. She has short, light turquoise twin-tails without headwear, large transparent eyes, and a faint blush on her cheeks; she is leaping with her upper body twisted, one leg kicked back, one hand spread wide, and the other hand gripping a water gun, wearing cute pool wear featuring white, light blue, and pink frills, ribbons, and check patterns with red accents. She is surrounded by sparkling water splashes and colorful sticker-like motifs of swim rings, beach balls, ice pops, sunglasses, and shells, set against a pale background with subtle checks, dots, and wave patterns including the text "SUMMER!" and "POOL DAY" within a decorative border. The visual style blends 75% flat cel-shading with 25% rough watercolor and marker textures, utilizing delicate colored linework, milky high-saturation colors, and soft summer light for a refreshing, pop anime poster atmosphere.