Moving multiple adjacent vertices via normals constraints

What I want to do is to move multiple vertices constrained to their own individual normals.

I try to do this by selecting individual origins for pivot center and setting the transformation constraint to normal.

This works perfectly fine if the vertices are not adjacent.

But when I try to do this to adjacent vertices connected by edges - it kinda averages out the orientation.

image
Basically instead of moving all these vertices along the dark blue line, I want to move them all along the light blue line. Their own individual normals.

Is there a possible way to do this? I figure this happens because of how the selection works, grabbing adjacent vertices selects the edge or face where possible.

Maybe the question to ask is whether there is a way to select adjacent vertices without selecting any edges or faces?

Shrink/fatten, alt+S, with default pivot and transform orientation.

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