Ever since she entered high school, Kotoko Aihara wanted to be in the same class as Naoki Irie. The only problem, Irie is the smartest student in school while Kotoko is one of the dumbest. Now in 3rd year high school, she still isn't there. One day, her home gets destroyed and the only place else to go was to Irie's home. Now that she lives close to him, will their relationship be the same, or will it become greater than it is?

Included one-shots: Volume 1: Boku ga Naku Volume 20: Pink no Yuki ga Futtara

Due to author's sudden death, Itazura na Kiss manga remains unfinished, but the 2008 anime adaptation portrays the author's planned ending found in her notes. Tada Kaoru had an accident while she was moving homes with her son and husband, and passed away around two and half weeks later.

The series has been published in English by Digital Manga Publishing since November 4, 2009. Media Do International/M'z Planning has been digitally publishing the series as itazurana Kiss since November 7, 2017.