It's guy bothered by doggirls in one and guy bothered by catgirls in the other. In both series (at least) one of the animal girls is head over heels in love with the mentioned guy. I found Koi Neko to be much better of those two, but I guess they are kind of similar, so if you liked one, you might try your luck with the other.
P.S. Koi Neko has very little fanservice, but Inumimi isn't exactly "lacking" in that aspect, so keep that in mind.