Kyō no Go no Ni, Koharu Sakuraba's debut manga, has been adapted into an OVA and an anime and has been adapted into another OVA in 2009. In 2006, Shinkūkan animated the OVA that was directed by Makoto Sokuza. Each episode of the OVA is presented in five distinct chapters except for the special. In 2008, the manga was readapted into an anime that was animated by Xebec, produced by Starchild Records, directed by Tsuyoshi Nagasawa, and written by Takamitsu Kouno. Each episode of the anime is presented in four distinct chapters except for the thirteenth episode. In April 2009, Kodansha announced that Xebec will produce an OVA adaptation of Kyō no Go no Ni, directed again by Tsuyoshi Nagasawa and written by Takamitsu Kouno. The plot focuses around everyday life of students of class 5-2 and more specifically around Ryōta and his group of friends over the course of their fifth grade.
The first OVA was released on DVD between March 24, 2006 and March 21, 2007 by Avex, entitled "1-3 Trimesters" (1-3学期) and "Spring Break" (春休み). A special audio track was included in the DVDs in which the female characters' voices are replaced by members of the idol unit Sweet Kiss; Chika's voice actor (Mai Kadowaki) is replaced by Saaya Irie; Yūki's voice actor (Mikako Takahashi) is replaced by Jessica; Kazumi Aihara's voice actor (Noto Mamiko) is replaced by Runa. Each DVD also has a special edit version that comes with an extra item or two. The DVD boxset was released on January 30, 2008. It included all four of the OVA adaptation's DVDs, an additional DVD entitled "Extracurricular Lesson" (課外授業) that included the extra chapter as well as an interview with the staff, and an additional CD which included: all three of the theme songs, all the tracks on the radio drama included with the special edit of the third OVA DVD volume, and a special wallpaper for a computer. The first OVA features one opening and two ending themes: "Baby Love" is used as the opening for all the episodes; "Yakusoku" is used as the first ending theme for the first two episodes; and "Sakura Iro Kaze" is used as the second ending theme for the last two episodes. In an interview, Mai Kadowaki said that "Sakura Iro Kaze" is the graduation song for class 5-2.