Nano Banana Pro: Your Secret Edge for Manga Mastery

--- generation_parameters: aspect_ratio: "1:3" manga_page_generation_prompt: layout_structure: type: Full page vertical 4-panel comic strip (yon-koma layout). arrangement: Four roughly square panels stacked perfectly vertically from top to bottom. spacing: Clear white gutters (margins) separating each of the four panels. title_area: (Optional) A small space at the very top for a title. overall_aesthetic: Printed comic magazine page look, slightly textured paper. art_style: description: 1970s-80s Japanese Gekiga style. Gritty, heavy shadows, serious tone. color_palette: Desaturated, heavy oil-painting colors, seppia tones, dark atmosphere. texture: Rough ink lines, analog brushwork, dramatic cross-hatching shadows, ink bleed effect. manga_elements: speech_bubbles: - Presence: Multiple hand-drawn speech bubbles (fukidashi) within panel boundaries. Style: Rough, organic outlines, containing placeholder Japanese marks. sound_effects: - Presence: Bold Katakana sound effects (onomatopoeia) integrated into the art. Style: Rough calligraphy (e.g., "ドォォォン", "ゴゴゴゴ"). panel_content_sequence: panel_1_top (起): - Scene: [Wide angle] Knight Alex (grim face, full armor) standing stiffly behind a modern convenience store counter. - Text/FX: Speech bubble with formal greeting. Small "ウィーン" (door sound). panel_2_upper_mid (承): - Scene: A scared salaryman customer shrinking away. Alex glaring intensely, leaning forward over the counter. - Text/FX: Customer's scared bubble. Large "ゴゴゴゴ" (menacing FX) around Alex. panel_3_lower_mid (転): - Scene: [Dramatic close-up] Alex pulling out his giant claymore sword just to point