^Pretty sure Yabuki wrote the original To Love Ru as well. He isn't just an illustrator.
If you wanna enjoy Black Cat, the best way is the manga. The anime was done before the manga ended and has a really weird made up final arc (kinda like the original FMA). The anime is an acid trip tho, so if you finished the manga it's worth checking out just for the spectacle.
^Well the series has been going for something like a decade now; it'd be a sad state of affairs indeed if the author's style and skills didn't evolve over such a long period looking at you Rob Liefeld