A realistic illustrated Korean middle school mathematics textbook cover titled "수학 2". Scene: a warm, emotional outdoor school pathway with trees and a blue sky. Two middle school students (boy and girl) wearing Korean school uniforms are walking side by side in profile view. They are drawn in a semi-realistic style, not cartoonish, and they occupy about one-third to almost half of the cover. Environment: tree-lined walkway, soft sunlight shining through leaves, gentle shadows on the ground, peaceful school atmosphere. The mood is nostalgic, warm, and calm. Color palette: soft blue sky, warm sunlight tones (yellow-orange), natural green trees, balanced with a clean academic textbook design. Composition: cinematic, slightly angled perspective, focus on the two students walking forward. Text: at the top center, clean modern Korean typography that says "수학 2". Style: high-quality Korean textbook cover illustration, professional, minimal branding, realistic lighting, detailed but clean design. Mehr sehen