Poyopoyo Kansatsu Nikki

Poyopoyo Kansatsu Nikki (ポヨポヨ観察日記) is a Japanese yonkoma manga by Rū Tatsuki. It was made into an anime television series in 2012. A video game based on the series in which players raise Poyo, a character from the series, was released in February 2012 for the Nintendo 3DS.

Plot
The slice-of-life manga centers around a mysterious "spherical cat" named Poyo, its family, and the people in Poyo's everyday life.