Draw a simple horizontal guideline for the mouth placement
Sketch a thin upper lip shape with a soft cupid’s bow
Draw a fuller lower lip with a gentle curve
Keep the lip edges less rounded and less pronounced
Make the mouth corners slightly downturned or neutral
Add a subtle separation line between the lips
Use minimal shading to define the upper lip and lower lip
Keep the upper lip darker than the lower lip
Soften the outline to avoid a glossy or overly feminine look
Adjust the width to match the face proportions
Refine the shape to look natural and balanced
Add light shadows under the lower lip and at the corners