DRAGON KNIGHT 4
This is a sequel to the well-known hentai RPG Knights of Xentar, which is originally called "Dragon Knight 3". Years have passed after Takeru (a.k.a. Desmond, the hero of "Knights of Xentar") defeated the ultimate evil. He married his sweetheart Luna, and they had a son named Kakeru. This 15-year-old boy has one weakness: he likes naked female elves... But soon he learns the evil wizard Lushifon wants to turn all people into stones, and to control the whole world without being disturbed by them. Together with the mysterious swordsman Eto, and many other heroes, Kakeru must perform his ultimate quest and to defeat Lushifon and his minions. Good luck!