Capture a candid portrait of a 20-year-old girl with a messy hair bun, showcasing her natural beauty in a cozy room setting. Emphasize sharp and realistic photography techniques to highlight her relaxed demeanor and warm smile. Use soft, diffused natural light coming through the window to illuminate her features, creating an inviting atmosphere. Position her off-center using the rule of thirds, and employ a wide aperture (f/1.8 or f/2.8) for a shallow depth of field that blurs the cozy background details while keeping her in sharp focus. This composition should evoke intimacy and warmth, capturing her authentic charm.
