Kodomo no Jikan

is a Japanese manga series written and illustrated by 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 serialized between May 2005 and April 2013 in Futabasha's Comic High! magazine and is compiled in 13 volumes. 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 they ultimately decided not to publish it due to controversies over its content. It was then relicensed by Digital Manga, who released the series in English through e-book.