Kakyūsei

is a dating sim series by ELF Corporation originally created by Masato Hiruta, as a spin-off of the Dōkyūsei series. Kakyūsei was released on PC-98 in 1996, MS-DOS and Sega Saturn in 1997, Microsoft Windows in 1998 and Mac OS in 2000. A sequel, Kakyūsei 2, wss released for Windows in 2004.

An anime OVA based on the first game, , was created by Pink Pineapple in 1998. The title distinguishes the anime from the similarly titled but unrelated OVA series of the same title, Kakyūsei, also produced by Pink Pineapple, but earlier, in 1995. It had a TV series produced in 1999, after the success of the OVA. The 14th episode of the TV series was never aired on television. A television series based on Kakyūsei 2 was also released in 1997, as well as 2006–2007 OVA sequels and spin-offs based on Kakyūsei 2, that were considerably more explicit than the TV version.