Oh man, this chapter was freaking amazing. I have to admit the guy's presence was a little unnecessary but it was compensated pretty well with how hot was the Yakuza wife. We need more of those in Yuri!
This series really is one of my favorites is just so, insanely awesome. Hopefully it won't be a wait as long as this one for the next chapter.
Oh and about the nails, looking through the whole series, seems like that is just the way the artists depicts femenine hands, not long nails per se.