[Protagonist] A 2nd-grade elementary school girl with a black bob (silver hairpin, bear T-shirt, dark red backpack)\n[Setting] A crosswalk in heavy rain\n[Antagonist] A black floor that opens its mouth the moment someone steps off the lines\n[Gimmick] The white parts of the crosswalk\n\n[Video Style]\n15 seconds. Japanese full-color anime. High-density 2D animation with a budget of 500 million yen. Precise background art, smooth in-betweening, and cinematic post-processing. To prevent visual repetition, vary the composition, camera angles, screen size, and character distance to create an engaging development. No subtitles, no watermark, no BGM. Include ambient sound.\n\n[Video Structure] In a city where the black floor opens its mouth, the protagonist moves forward by stepping only on the white parts of the crosswalk. The stepped areas glow momentarily, and the footsteps create a rhythm. Gaps are crossed with big jumps, and finally, she lands with both feet at the destination, causing the black floor to close.\n\n[One-time Highlight (To be included in Shot 5-7)] As she steps on the rain-glistening white lines in order, water splashes bloom like white flowers.\n\nShot 1 (Hook): A crosswalk in heavy rain. The protagonist's footsteps are heard only on the white parts of the crosswalk, not the ground. She focuses on her feet with a serious expression.\nShot 2 (Black Floor): The ground outside the white parts of the crosswalk sinks into blackness and opens its mouth where she might step off. The protagonist looks down with a tense face.\nShot 3 (Rhythm): She proceeds by stepping accurately on the white parts. Each stepped spot glows for a second, and the footsteps form a rhythm. Joy gradually begins to show on her face.\nShot 4 (Parallel): The camera runs alongside her at ground level. Only the protagonist's shadow is running on the ground. Light footwork.\nShot 5 (Gap): A section where the white parts are disconnected. The protagonist takes a running start and makes a big jump. A serious face as she holds her breath and jumps with all her might.\nShot 6 (Landing): She lands perfectly in the middle of the next white part of the crosswalk. The black floor ripples in frustration. The protagonist gives a fearless, smirking smile.\nShot 7 (Goal): Upon landing with both feet at the destination, the black floor closes and returns to normal. She says 'Safe' with a satisfied look.