Half of it was due to the drug's effects, and the other half was because he got beaten by Nangong Xinyue.
To speak of Nangong Xinyue, that woman's strikes were truly ruthless. This series of outbursts almost took half of his life, leaving him without even the strength to call for help. Fortunately, she wasn't a truly vicious character, and upon seeing him bleeding profusely, she was scared and fled without continuing to hit him.
Muto Kenzo was also feeling gloomy, thinking damn it, just you wait. Once I recover, I'll get you back and let the men from the Underworld torment you hundreds of times a day until you don't even know how you died.
