Kud Wafter is a Japanese adult visual novel developed by Key, released on June 25, 2010, for Windows. Kud Wafter is Key's eighth game, along with other titles such as Kanon, Air, and Clannad. Key released a version of Kud Wafter without the erotic content, and the game was ported to the PlayStation Portable and PlayStation Vita. 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. The gameplay in Kud Wafter follows a branching plot line which offers pre-determined scenarios with courses of interaction, and focuses on the appeal of the title character Kudryavka, also known as "Kud" for short.