Ultra-realistic cinematic fitting room scene. A teenage boy (16 years old, blonde) with a sharp glossy side-part undercut hairstyle stands in front of a mirror wearing a perfectly fitted ruffled shirt for the first time. His posture becomes more upright as he adjusts the collar and touches the layered ruffles. His expression is calm but noticeably more confident. Soft warm lighting, mirror reflections creating depth. High-end editorial style, capturing the moment where the fit changes posture and presence.