Sunny Beach Portrait of a Smiling Woman

Subject:
{argument name="subject" default="Smile at the water's edge"}

Main Character:
{argument name="main character" default="A vertical portrait of a woman in her 20s standing on a sunny beach, captured from the top of her head to her upper thighs"}. The person is placed large in the center of the frame, with her upper body occupying about two-thirds of the screen. Set against a background of clear blue sea, white waves, and a bright sandy beach, she is turning a friendly smile toward the camera.

Person/Expression:
Bright ivory-beige fair skin with a subtle pink natural flush. Delicate highlights on the cheeks, tip of the nose, shoulders, and collarbones, with a realistic skin texture that leaves slight pores and texture. Pale rose pink blush, champagne beige and pink-brown eye makeup, long slender eyelashes, natural tear bags, soft brown eyebrows, and sheer pink-beige gloss lips. Small, clear catchlights in the eyes. A bright and healthy smile with the mouth naturally open, looking directly at the camera.

Clothing/Pose:
An ivory-white halter-neck bikini without decorations. The top has modest gathers and thin shoulder straps, while the bottoms have side ribbon ties at both hips. The person places her own right hand near her ear, lightly adjusting her hair with her fingertips. Her left arm is naturally down by her side, and her upper body is slightly tilted forward. A natural standing posture with relaxed shoulders and a light twist in the hips. Wet stray hairs follow her cheeks and neck.

Background/Light:
The foreground is a pale sandy beach reflecting sunlight. In the middle ground, white waves wash up diagonally, and in the background, a turquoise blue to light blue sea surface stretches out. Warm summer sunlight enters from the top left of the screen, brightly illuminating the face, shoulders, collarbones, and upper surfaces of the arms. Soft shadows are cast under the chin, chest, and inside the arms, with a pale blue reflection from the sea surface added thin to the shadow side of the skin.

Composition/Camera:
Vertical 9:16. A light high-angle shot looking down from a slightly high position. The person's face is in the upper center, the torso in the center, and the thighs at the bottom. Very little head space, with soft margins for the sea and sand on the sides. Natural perspective equivalent to 35-50mm. Focus accurately on the eyes and face, softly blurring the waves and sea surface in the background. A bright and open beach portrait.

Texture/Style:
A live-action photograph. Meticulously describes natural fine skin texture, moisture-laden hair clumps, fine vellus hair, and thin wrinkles in the fabric. Avoids excessive skin beautification, maintaining a bright high-key tone while suppressing overexposure. Transparent summer colors, soft contrast, and photo-book quality with a sense of cleanliness.

Negative:
Young-looking face, unnatural smile, unnatural gaze, extra fingers, missing fingers, fused fingers, confusion of left and right hands, broken joints, unnatural body shape, clothing digging in, poor fabric connection, floating strings, incorrect perspective, shadows inconsistent with the light source, plastic-like skin, excessive skin correction, text, logo, watermark.

主題：
{argument name="主题" default="波打ち際の笑顔"}

主体：
{argument name="主体" default="晴れた海辺に立つ20代女性を、頭頂から太もも上部まで収めた縦長ポートレート"}。人物は画面中央に大きく配置し、上半身が画面の約3分の2を占める。透明感のある青い海と白い波、明るい砂浜を背景に、カメラへ親しみのある笑顔を向けている。

人物・表情：
明るいアイボリーベージュの白肌に、ほんのりピンクの自然な血色。頬、鼻先、肩、鎖骨に繊細なハイライトを入れ、毛穴や肌理をわずかに残したリアルな肌質。淡いローズピンクのチーク、シャンパンベージュとピンクブラウン spacing のアイメイク、細く長いまつ毛、自然な涙袋、柔らかなブラウン眉、透け感のあるピンクベージュのグロスリップ。瞳には小さく澄んだキャッチライト。口元を自然に開いた明るく健康的な笑顔で、視線はまっすぐカメラへ向ける。

服装・ポーズ：
装飾を省いたアイボリーホワイトのホルターネックビキニ。トップは控えめなギャザーと細い肩紐、ボトムは両腰で結ぶサイドリボン仕様。人物自身の右手を耳元へ添え、指先で髪を軽く整える。左腕は体側へ自然に下ろし、上体をわずかに前へ傾ける。肩の力を抜き、腰を軽くひねった自然な立ち姿。濡れた後れ毛が頬と首筋に沿う。

背景・光：
前景は陽光を反射する淡い砂浜。中景に白い波が斜めに打ち寄せ、後景にはターコイズブルーから淡い水色へ変化する海面が広がる。画面左上から暖かい夏の日差しが入り、顔、肩、鎖骨、腕の上面を明るく照らす。顎下や胸元、腕の内側には柔らかな影を落とし、海面からの青白い反射光を肌の影側に薄く加える。

構図・カメラ：
縦9:16。やや高い位置から見下ろす軽い俯瞰アングル。人物の顔を上部中央、胴体を中央、太ももを下部に配置する。頭上の余白はごく少なく、左右には海と砂浜の柔らかな余白を残す。35〜50mm相当の自然な遠近感。瞳と顔に正確にピントを合わせ、背景の波と海面は穏やかにぼかす。明るく開放的なビーチポートレート。

質感・スタイル：
実写写真。自然な皮膚の微細な質感、水分を含んだ髪の束感、細かな産毛、布地の薄いシワまで丁寧に描写。過度な美肌加工を避け、明るいハイキー調ながら白飛びを抑える。透明感のある夏色、柔らかなコントラスト、清潔感のある写真集品質。

ネガティブ：
幼く見える顔、不自然な笑顔、不自然な視線、余分な指、欠けた指、手指の融合、左右の手の混同、関節の破綻、不自然な体型、衣服の食い込み、布の接続不良、浮遊する紐、誤った遠近法、光源と矛盾する影、プラスチックのような肌、過度な美肌補正、文字、ロゴ、透かし。