This is a list of light novel volumes in the Sekai-ichi Hatsukoi series. The novels are authored by Fujisaki Miyako, based on the series created by Shungiku Nakamura. The novels also contain illustrations and short manga chapters by Nakamura.
Novel chapters continue to be serialized in Emerald magazine and released in volumes.
The volumes have not been officially released in English.
The first light novel installment was The Case of Chiaki Yoshino No.1, which was published in the November 2006 issue of The Ruby magazine and went on sale October 13, 2006. The first volume was released on November 1st, 2007 under the Ruby Bunko label.
In 2016, the series' The Case of Chiaki Yoshino and The Case of Takafumi Yokozawa were reprinted in omnibus volumes, with each omnibus volume containing about two of the original volumes. Chiaki Yoshino's original four volumes were reprinted into two omnibus volumes, and Takafumi Yokozawa's original six volumes reprint into three omnibus volumes. The original volumes were printed under the Ruby Bunko label, while the omnibus reprints were under the Asuka Ciel label.