Dessin serpent minimaliste, serrure et clé aquarelle

Tattoo design concept on white paper: best friend lock and key. Style: watercolor splash. Intended for chest, statement 20cm+. Clean flash-sheet illustration — high contrast, sharp lines, no shading bleed. Render on plain white background as a tattoo artist would draw before applying. No real-person portraits without explicit context, no hate symbols (swastikas, SS runes, etc.), no copyrighted character likenesses, no offensive imagery. Specifically: best friend lock and key. Target search intent (rendered visually, no on-image text): "dessin serpent minimaliste" (fr).