I have played the following and can recommend all of them. All can easily be played translated with a texthooker such as Textractor. I will be frank-- all of the games I recommend here will feature either lewd kissing, blowjobs, rimjobs, or a combination of all. If you like Arekara4nen's work, I believe you would enjoy these, though, they are much longer, traditional VN's than simply the scene-to-scene style.
You must be registered to see the links
Powerful warrior princess is forced to become the Protagonist's sex slave or he will execute her captured countrymen. She spends most of the game in a vibrating chastity belt that is psychically connected to the main character, so he can torment her at will. There is also an elf queen and an elf princess who similarly are blackmailed into submission. Play the game, avoid the anime.
You must be registered to see the links
Princess knight captain is blackmailed by an Orc to become his sex slave.
You must be registered to see the links
Queen becomes an Orc king's sex slave in order to save her kingdom. While she is very timid and submissive, she has a strong sense of morality. Again, avoid the anime.
The following three are thematically similar to the above (strong or important women), but feature
hypnosis (saimin) instead of
moral compulsion or blackmail.
You must be registered to see the links
All four love interests are teachers (or principal) to the Main Character. The homeroom teacher and the principal both have feisty temperaments. Avoid the anime.
You must be registered to see the links
Similar to the above, but with a medieval fantasy vibe.
You must be registered to see the links
Medieval fantasy. Queen, two princesses, and an assassin.
Additionally, there are also sporadic occurrences in the
Kuroinu games by Liquid.
Off the top of my head, in the first
You must be registered to see the links
game, Princess Alicia is tricked into sex by her traitorous minister, a lecherous old man.
In
You must be registered to see the links
, in order to spare a mother and daughter, one of the invading mercenaries (a female dark elf) agrees to one month of sexual slavery in their stead. Of course, things do not go smoothly for her...
I'll give one final special mention to
You must be registered to see the links
. While the women are not necessarily "powerful" as requested, they are strongly compelled to comply to the demands of the main character.