Heaven's Memo Pad

is a Japanese light novel series written by Hikaru Sugii, with illustrations by Mel Kishida. ASCII Media Works published nine volumes between January 2007 and September 2014 under their Dengeki Bunko imprint. A manga adaptation illustrated by Tiv was serialized between the August 2010 and September 2012 issues of ASCII Media Works' Dengeki Daioh magazine. An anime adaptation aired 12 episodes in Japan between July and September 2011.

Plot
The story centers around Narumi Fujishima, the main protagonist. He is a high school student who is not very involved in his school whatsoever to the point where he does not know most of his classmate's names. However, he then encounters the reclusive genius hacker Alice, who runs a special detective agency where all her professional associates refer to themselves as "NEETS (Not in Education, Employment, or Training)". Narumi soon finds himself in a world of dangerous criminal investigations conducted by this ill-assorted group of detectives using their limited resources and Alice's intellect, all because they say it's the only NEET thing to do.

Other Sources

 * Wikipedia