Chibi Devi!

 is a Japanese "shōjo" comedy manga series written and illustrated by Hiromu Shinozuka about a middle school girl who discovers a devil baby on her bed one day. It was adapted into an anime television series by SynergySP which aired in Japan from October 10, 2011 to February 17, 2014.
Plot.
Honoka Sawada is a lonely girl who is often picked on by others. One night, a strange baby named Mao appears before her, and she soon learns that this baby is none other than a baby devil.
Media.
Manga.
The original manga by Hiromu Shinozuka began serialization in Shogakukan's "Ciao" magazine from May 2008 to October 2014. In Europe it has been released in German by Egmont from December 2010 as Chibi Devil and in French by Soleil from September 2013 as Chibi Devi.
Eleven tankōbon volumes were released, with volume 6.5 being a special fan book to coincide with the start of the anime. Volumes 7, 8 and 9 all had limited edition versions in addition to the normal versions which included a DVD containing episodes from the anime.
Anime.
An anime television series based on the manga was announced in the October 2011 issue of "Ciao". The series began airing on Japan's NHK Educational TV, NHK-E, as part of the "Dai! Tensai Terebi-kun" program block, airing from October 10, 2011 to February 17, 2014. Each episode is exactly 5 minutes long. It began airing in Korea on November 19, 2013 on Tooniverse as Baby Devil! ().
A costume design competition was announced on May 28, 2012 during the "Dai! Tensai Terebi-kun" program on NHK-E, immediately after episode 23 aired. This announcement was repeated again right after episode 25 (originally broadcast June 18, 2012) and a notification was put on the anime's homepage. The winning designs were featured in episode 39 as part of a "Magic Testing Room" which was a room where the children could use the magic from costumes not made by their parents.