|Source: Practical Kata Bunkai|
What you cannot do is the double side kick. There's no way to realistically apply it from this close a range, and why use it over simpler hand strikes? However, I don't think the two kicks are meant to be used from this defensive position, but rather as your opponent escapes from this position.
Applying pressure to the side of the neck is uncomfortable and once the opponent realizes they can't take you down, they may dive away from your knifehand.
(1) Since you have an overhook, you have tactile information that their arm is slipping. (2) Lock their arm with both hands as you turn 180-degrees stepping forward. (3) Perform the low side kick to the side/back of their knee. This will cause them to collapse onto that knee, lowering their head. (4) Perform the second side kick to the back of their head. Pull the arm back while kicking for greater damage.
I have one more application from Koryo that I will discuss in my next post.