
Originally Posted by
Ryllharu
All of Hojo Tsukasa's works have references to the others. I'm a huge fan by the way. There is always a Cat's Eye (btw, Hitomi, one of the hottest female characters of all time) cafe somewhere in each of the series. Even CLAMP references Cat's Eye a few times in their own series.
It is heavily implied that the cafe in City Hunter and Angel Heart is the exact same cafe the three Kisugi sisters used to occupy. The layout and design is exactly the same.
I couldn't keep up with the anime, but I read a good chunk of the manga for this one.