Start in opponent's halfguard kneeshield.
Get a scoop grip behind their top knee.
Use the scoop grip to drag their knee way, sit left hip to mat and left elbow across body.
Slide your left elbow and your hip up into their armpits to get their arms up.
Use right arm to free and move your right knee to the mat to get to 3/4 mount.
With hands at 10 and 2 o’clock, place left shin inside their thigh to move to butterfly mount.
Flick both ankles over their hips and under them to finish in full mount.

Using Kneedrag to Reverse Underhook Pass to Mount