anime style illustration, dramatic poster layout, two rival high school pillow fight teams facing off in a gymnasium, left side shows three regular high school girls in athletic gym uniforms holding pillows with determined expressions, right side shows three muscular high school girls with powerful physiques, arms crossed and holding pillows confidently, bold VS text in the center, feathers flying through the air, cinematic lighting and shadows, dramatic floor reflections, glowing title text "PILLOW BATTLE - FINAL SHOWDOWN" and caption below saying "When pillows fly, only the strongest will remain.", full poster composition, high detail