Ah you were not satisfied with Princess Escape so you basically forgot it and replaced it with Damsel Quest. Then I guess it is not worth attention. I didn't play much Damsel Quest because I didn't get into it but I really enjoyed Damsel Quest 2: Princess Ren Returns which is my current favorite of your games that I played so far (I didn't play Damsel Quest 3 yet, I am currently playing Witch Dungeon and Marielle Mansion Madness got me fed up with the sliding tiles puzzle which got me stuck for a while until I give up.) even though its conclusion feels dumb. :-) By the way, since you have continued the story with a sequel, don't you think you should now update Damsel Quest 2's conclusion in order to make the link with Damsel Quest 3? Because DQ2 concludes with "The castle was left in a mess but the 3 protagonists didn't care because they lived happily together ever after, the end." then DQ3 came to say "Actually no, I changed my mind, they didn't live happily ever after, it didn't end like this, they dealt with the mess after all.". :-3 My point is that DQ2's conclusion was meant to be the definitive conclusion so now that you have continued the story, this conclusion is outdated and could use an update to make the link with DQ3, don't you think? ;-)
I don't understand, since dlsite is hosting DeepGround Lab, can't you ask them to give you a copy?