[Speech rule — read first] The woman speaks JAPANESE ONLY. She never speaks Chinese, English, or any other language. She speaks almost continuously for the whole clip. She says exactly this one sentence, broken into four phrases, in this order and nothing else: 「Seedance 2.5なら」 「黒板に日本語の文字を」 「書くことができます。」 「とても便利ですね」 She delivers it at the unhurried pace of a teacher writing on a board: her voice slows to the speed of her own chalk, so each phrase is spoken while her hand is forming that same phrase. Voice and chalk advance together. Only a short natural breath separates one phrase from the next — no long pause anywhere. Total speech fills roughly 13 of the 15 seconds. The only silence is the final 0.8 seconds, where she has finished writing and simply smiles and nods. Forbidden at all times: ad-libbed dialogue, filler words, repeating a phrase, reading the sentence twice, humming, laughing, sighing, and every wordless vocalisation such as "んっ" "うん" "ふふ" "ah" "mm" "hm". She says the four phrases once each and nothing more. Pronounce "Seedance 2.5" as English "seedance two point five". [Reference] @Image1 = the keyframe: a woman in a white coat standing beside a completely empty green chalkboard, holding a slim wooden pointer at her side. Strictly preserve @Image1's face, hair, glasses, white coat, the chalkboard's position and size, the easel, the background shelves, and the framing. Nothing moves in the frame except her arm, her upper body, her face, and the chalk marks she draws. [One-line summary] 15 seconds. A cheerful presenter gives a short lecture, writing four lines of Japanese on a green chalkboard with the tip of a wooden pointer while speaking the same words aloud. Pixar-style 3D animation. Locked-off static camera. [Global setup] Environment: warm indoor study room, soft warm ceiling light, shallow depth of field, background shelves stay blurred. Highly realistic physical texture on the chalk dust and the wood of the easel. Visual style: Pixar-style 3D animation, warm color grade, soft shadows. Camera language: medium shot, eye level, straight-on. The camera is completely locked off — no pan, no tilt, no zoom, no push-in, no handheld shake. One camera behavior only: none. Character: as in @Image1. Keep the glasses, the hair silhouette, and the coat identical. Keep believable skin shading and fine surface detail — do not make her look plastic. Acting core: a warm, confident teacher who enjoys showing something off. *** WRITING RULE — SHE IS THE ONE WRITING, AND SHE WRITES AS SHE SPEAKS. *** Every chalk mark is produced by her own hand movement, in time with her voice. For each phrase: 1. Her shoulder and elbow carry the pointer tip to the start of the line. Her torso turns slightly toward the board and her eyes go to that point first. 2. The tip presses lightly to the board and travels along the path of each stroke. The chalk line appears directly behind the moving tip, following it exactly, never running ahead of it, never appearing anywhere the tip has not touched. 3. Characters are formed one stroke at a time, in correct Japanese stroke order, left to right. Faint chalk dust puffs at the tip and a soft scraping sound follows it. 4. Between strokes the tip lifts a few centimetres, then sets down at the start of the next. 5. The syllables she speaks land together with the characters she is forming — when her voice reaches a word, her hand is writing that word. Voice and chalk stay in step. 6. At the end of each line she lowers the pointer slightly, takes one small breath, glances at the camera, then moves to the line below. Her arm leads and the mark follows — the timing of the arm and the timing of the mark must match frame for frame. Marks NEVER fade in as a whole word. Marks NEVER appear while her arm is at rest or while the tip is away from the board. No invisible hand. No magic writing. The arm motion is fluid and human: the wrist flexes, the elbow opens and closes, the shoulder carries the reach across the board, her body weight shifts slightly as she reaches. Once a line is finished it stays on the board unchanged for the rest of the shot. Japanese script rule (important): Render every kanji with its correct stroke structure and correct number of strokes — 黒 板 日 本 語 文 字 書 便 利. They must be legible as real Japanese characters, not invented or Chinese-simplified lookalikes. Write them at a generous size so the strokes stay separated. "Seedance 2.5" is written in Latin letters and digits exactly as spelled: S-e-e-d-a-n-c-e, space, 2, period, 5. Chalk colors — only two, never any other: YELLOW chalk for "Seedance 2.5" only. WHITE chalk for everything else. Layout rule (important): Four lines, left-aligned to a common left margin, stacked evenly down the board from top to bottom, filling the board by the end. Large, cheerful hand-lettered chalk style with slightly uneven strokes. Exact content, top to bottom: Seedance 2.5なら 黒板に日本語の文字を 書くことができます。 とても便利ですね Never centre a line. Never write small. Each line is written as large as it can be while still fitting: a completed line spans almost the full writable width of the board, from the left margin nearly to the right edge of the board, and the four lines together fill the board from top to bottom. Characters are wide and generously spaced so that dense kanji such as 黒 板 語 書 便 利 keep their strokes separated and legible. If a line would not fit, make the characters narrower rather than shorter in height — never shrink a line so that it occupies only part of the board's width. Do not add any other word, symbol, arrow, underline or drawing. Forbidden: no subtitles, no captions, no on-screen UI, no watermark, no background music, no camera movement, no cutting to another shot, no extra people, no second hand entering the frame, no stick of chalk held in her free hand, no distortion of lines already written. [Timestamp storyboard] 0.0-3.6s LINE 1 Action: she raises the pointer to the upper-left of the empty board and writes "Seedance 2.5なら" in YELLOW chalk — first the Latin letters and digits, then the kana なら — the marks trailing the moving tip. Speech (in step with the writing): 「Seedance 2.5なら」 Intent: a small proud lift in her eyebrows on the brand name. This is the thing she is showing off. Camera: locked. No subtitles. No BGM. Japanese only. 3.6-7.2s LINE 2 Action: she drops to the next line and writes "黒板に日本語の文字を" in WHITE chalk, stroke by stroke. Her eyes follow her own tip. Speech (in step with the writing): 「黒板に日本語の文字を」 Intent: matter-of-fact, the setup half of the sentence. Keep the arm steady and even. Camera: locked. No subtitles. No BGM. Japanese only. 7.2-11.0s LINE 3 Action: she drops to the third line and writes "書くことができます。" in WHITE chalk, stroke by stroke, ending with a firm dot for the 。 Speech (in step with the writing): 「書くことができます。」 Intent: this is the payoff of the sentence — her voice firms up slightly on ます, and the final dot is pressed with a small decisive tap. Camera: locked. No subtitles. No BGM. Japanese only. 11.0-15.0s LINE 4 — the close Action: she writes "とても便利ですね" in WHITE chalk on the bottom line, then lowers the pointer to her side, turns her face fully to the camera, breaks into an open warm smile and gives one clear nod. She holds that pose for the final 0.8 seconds in silence. Speech (in step with the writing, finishing by 14.2s): 「とても便利ですね」 Intent: the nod is the close. Warm, a little playful, as if sharing a good discovery. Camera: locked. No subtitles. No BGM. Japanese only. [Closing constraints — restated for the whole clip]
