Kodomo no Jikan (こどものじかん, Kodomo no Jikan? lit. A Child's Time) is a Japanese manga series written and illustrated by manga author Kaworu Watashiya. The story revolves around a grade school teacher named Daisuke Aoki, whose main problem is that one of his students, Rin Kokonoe, has a crush on him. It was first serialized on May 22, 2005 in the Japanese seinen manga magazine Comic High!, published by Futabasha. At one time, an English language version of the manga was licensed by Seven Seas Entertainment for distribution in North America under the title Nymphet, but the Los Angeles–based company ultimately decided not to publish it due to controversies over its content. An anime adaptation of the series aired on Japanese television between October 12, 2007 and December 28, 2007. While content of the broadcast version was sometimes heavily censored, the DVD releases of the individual episodes remain unedited. A second anime season has been announced, and a promotional video of this season is going to be included with a special edition of the fifth manga volume out on July 11, 2008.

Source: Wikipedia