Nekoya Ai is a cute teenager, and the youngest of three brothers, who can shape-shift turns into a cat. Shift can occur uncontrollably when they're under emotional distress. Ai is saved from bullies by his classmate, a cat lover, Kurokawa. This is their story.
A series extra ~ Compilation of shorts featuring all members of the Nekoya family.
Chapter 5 only ~ side story for the main pair ~ Ai x Kurokawa
http://www.mangago.me/read-manga/kemono_jingai_bl/mf/v01/c005
The Nekoya family's eldest brother Kai, is the most sensitive brother ~ what will happen when he falls in love with his university classmate Suzuki Kyousuke?
The story of the Nekoya family's middle brother, Sai ~ the most efficient & responsible of the bunch!
Baka-Updates link for more info
Neko Neko Carnival
Contains side stories about the three Nekoya brothers who can turn into cats from the Neko Neko series
Neko Neko Honey