Shinya Murata is supposedly only storyboarding this, but it's all the same as his other stuff -- themed assassins and body fluid fetishes. The Sweat Gal with the poison hook even works as a nurse like the Scorpion Gal from Arachnid.
This is definitely one of those 'Turn off your brain' kind of moments. Typical 'MC is clearly reluctant but everyone still thinks he's the aggressor just because of his appearance' stuff. Not sure if I'll stick with this one.