Kud Wafter (クドわふたー, Kudo Wafutā) is a Japanese adult visual novel developed by Key, released on June 25, 2010, for Windows.

The story follows the lives of high school students Riki Naoe and his close friend Kudryavka Noumi as they start to see more of each other in a romantic relationship.

Throughout gameplay, the player is given multiple options to choose from, and text progression pauses at these points until a choice is made.

Ecstasy, and Kudryavka Noumi (能美 クドリャフカ, Nōmi Kudoryafuka, voiced by: Miyako Suzuta), one of the main heroines of the same games and the title character of Kud Wafter.

Kud Wafter begins at the onset of the summer vacation after the events of the peaceful field trip from Little Busters!.

[3] The other members of the Little Busters have returned home for the break, leaving Riki and Kudryavka to spend their vacation living at the school dormitories as they form a romantic relationship.

However, the male dormitory is undergoing renovations due to a problem with the plumbing, leaving Riki without a place to stay.

[3] Also living at the dorms is a girl named Yuuki Himuro (氷室 憂希, Himuro Yūki, voiced by: Kumiko Okukawa) whom Kudryavka knew and was roommates with for a time in Kudryavka's home country; Yuuki is half Japanese, a quarter German and a quarter Russian.

A-chan is the president of the home economics club, which Kudryavka is a member of, and she likes interesting and strange things.

[7] The artists Na-Ga and Itaru Hinoue were the art directors and character designers, both of whom previously worked on Little Busters!

[9] To advertise Kud Wafter, Good Smile Racing took Shinji Orito's 2003 Honda Fit and made it into an itasha (a car featuring illustrations of anime-styled characters) with images of Kudryavka.

[14][15] Prototype released a PlayStation Portable (PSP) port of the game titled Kud Wafter Converted Edition on May 9, 2013,[16] which contains additional story events and visuals.

[26][27] An anthology of a collection of four-panel comic strips titled Kud Wafter 4-koma Maximum was released by Wedge Holdings in September 2010.

[29] Taibundo released a manga anthology titled Kud Wafter as the first volume in their Earth Star Comics line in December 2010.

[33] Key's parent company VisualArt's announced they were putting together a production committee for a possible anime adaptation in January 2017.

[34] VisualArt's launched a crowdfunding campaign on July 18, 2017, to fund the anime adaptation, and it reached its goal of ¥30 million in three days.

[35] The campaign reached its final stretch goal of ¥60 million to produce a 51-minute theatrical anime originally scheduled to premiere in September 2019 to be directed by Yoshinobu Yamakawa at J.C.Staff with Key having complete supervision over it.

A ten-track arrange album remixing music from the game titled Albina: Assorted Kudwaf Songs was released at Comiket 79 in December 2010.

[45] A piano arrange album titled Ripresa, which also features tracks from Little Busters!, Ecstasy and Kud Wafter, was released in April 2013.

[46] The limited edition version of Kud Wafter ranked first in terms of national sales of PC games in Japan in June 2010.

[52] Both the PSP and PS Vita ports were reviewed by the Japanese video game magazine Famitsu, which gave them an overall score of 27/40.