Dark Lovesick Anime Letter Transformation

Using the provided reference image as the character and composition base, regenerate it as a darker, more intense anime illustration while keeping the school-uniform motif and red background. Change the mood from shy sweetness to {argument name="mood" default="feverish, lovesick, slightly unhinged joy"}: make her head tilt back slightly, eyes half-lidded, cheeks flushed, and mouth open in a breathy smile with visible teeth. Make the hair much wilder and messier, with tangled strands falling across her face and spreading outward.

Transform the clean white letter into an aged cream envelope held close to her mouth, closed with a central {argument name="envelope seal" default="red wax seal"}. Replace the simple green stems around her wrists with darker thorny vines that wrap tightly around both hands, wrists, fingers, and across the envelope in a heart-like tangle. Add exactly 8 small {argument name="flower type and color" default="purple aster-like blossoms"} distributed on the vines: 2 near the upper envelope area, 2 on the right side, 2 around the hands, and 2 near the wrists/lower vines.

Use a more dramatic, painterly, high-detail anime style with deeper shadows, richer black hair, muted skin tones, and a gothic romantic atmosphere. Keep the background as a flat vivid {argument name="background color" default="red"}, with no extra objects, no text, and no watermark.