Neko Sis

is a Japanese light novel series written by Tsukasa Fushimi, with illustrations by Hiro Kanzaki. The series began publication on October 10, 2009 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Mio, the third daughter of Nekomata's sisters who longs for humans, has finally become a human figure at the age of 14. Whether or not to live as a human being is decided after experiencing the human world first ── Mio, who was ordered to do so by her eldest sister, will spend seven days and seven nights in the form of a human being to understand human beings. ..

Beginning with unfamiliar bipedalism, human language, human baths, human friends, human romance ──Mio, who has never experienced anything before, is just confused ...!? Kagura, the eldest daughter of "Human Hate". Chiyoko, the second daughter who is "devoted to human culture". The fourth daughter, Suzu, who "loves humans". And Mio, the third daughter of "I just became a human".

A comedy with cat ears, developed by four sisters who have different patterns and personalities!