Dragon Knight 4

Dragon Knight 4 (ドラゴン・ナイト4 ) is an erotic role-playing video game developed by ELF Corporation and released only in Japan for several platforms between 1994 and 1997. In 1994, the game first became available for PC MS-DOS, NEC PC-9801 and X68000, with a censored version ported to the Super Nintendo Entertainment System in 1996 and later to the PC-FX, PlayStation and Sega Saturn in 1997. It was also adapted into illustrated novels and an anime miniseries.
Dragon Knight 4 is a continuation of the