Unofficial port of PC-98 version of Dragon Knight 4. Juice Kim modified original AI5 engine to make it running on IBM-PC DOS. It was not without its limitations though, for example, sound was not playable due to difference between hardwares.
As far as I know, Elf had no official release of this game for Japanese DOS/V. In the meantime, officially localized ports of the game were later brought to IBM-PC DOS platform by Game Box for Korean and Chinese markets.