Kodomo no Jikan (こどものじかん, 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.
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 was included with a special edition of volume five of the manga.
Plot: The main story of Kodomo no Jikan is centered around twenty-three-year-old Daisuke Aoki, who has just landed his first teaching job as a grade school instructor at Futatsubashi Elementary School (双ツ橋 小学校, Futatsubashi Shōgakkō ). He is placed in charge of Class 3-1, where one of his students, a mischievously precocious nine-year-old girl by the name of Rin Kokonoe, develops a crush on him and goes so far as to proclaim herself Aoki's girlfriend. She aggressively pursues her efforts to be with her teacher despite the fact that he will lose his job if she gets too close, a situation further complicated by the often complex, intertwining relationships existing between them and their respective friends, families, and peers.
(source: Wikipedia)