Realistic, highly detailed photograph of Mika from Blue Archive depicted as an adult model in a retro-style classroom with wooden desks, a dark green chalkboard, large windows with white curtains, evoking early Showa–Heisei era atmosphere. From a low camera angle close to the subject, Mika sits on a wooden chair, body angled slightly,legs crossed, one arm relaxed at her side. She wears an oversized white collared shirt with sleeves rolled up to the elbows, her shirt unbuttoned deeply to emphasize cleavage while remaining tasteful. A deep navy pleated skirt flares slightly as she sits, paired with black socks and simple shoes. Her shoulder-length black hair with light bangs frames her serene face, soft natural skin showing fine texture, subtle blush on cheeks and knees, gentle light highlights from the left window illuminating her profile and shirt, faint shadows on the opposite side. Shallow depth of field softly blurs the classroom background, quiet introspective mood,photorealistic,8K, cinematic composition,natural lighting, vertical portrait.