Lady Sword, on the NEC PC-FX, is likely an action-adventure game featuring a female protagonist skilled in sword fighting. Gameplay would probably involve navigating levels, battling enemies, and solving puzzles.  The game might incorporate a narrative, perhaps about a warrior's quest or a story centered on feudal Japan or a fantasy setting.  The title suggests a focus on sword combat mechanics. As a PC-FX game, it's expected that sprite-based graphics and sound would be used.  Information about the specific plot details and developer are not readily available. 

Lady Sword (Japan)

Kyuukyoku Mahjong - Idol Graphics (Japan)