masterpiece, best quality, score_9, score_8, score_7, newest, highres, very aesthetic, cartoon, toon, safe, 4girls, quartet, vocaloid, square 2x2 ensemble,top-left: kasane teto \(voicepeak\), wink, cheerful smile, open red track jacket marked "4B", left hand pointing toward the center;top-right: gumi \(ai megpoid\), lively open-mouth smile, open green track jacket marked "4B", right hand raised beside her face, leaning on top of akita neru;bottom-left: hatsune miku \(vocaloid6\), bright smile, open blue track jacket marked "4B", one hand reaching toward the center foreground;bottom-right: akita neru, yellow side ponytail, bored sidelong gaze, open yellow track jacket marked "4B", looking at yellow phone held near her cheek;all four leaning inward with varied head tilts, lower pair slightly larger, shoulders overlapping without covering faces,tight square group portrait, slight low central view, four faces arranged around a small central diamond, (faces large and evenly readable:1.5), (centerward hands:1.25), circular eye path, clean separation between characters,out of focus classroom background, orange filtered sunset, thin rainbow double border with neon edge accents,dominant white field, broad red-green-blue-yellow jacket blocks, sparse neon highlights, crisp face lighting, backlighting, shallow layered depth
