I tend to lose focus in the more wordy text adventures, so the writing style where no description or line of dialogue takes up more than three lines of text is definitely one that I like. I did find the phone segments confusing at first due to the lack of capitalization before I realize that it's texting. You might be able to use a different speaker icon or font for those to indicate that it's text.
The art is good, but the character art style clashes with the realistic backgrounds and the hand holding the phone. Drek has an excellent range of expressions and poses. I did however expect to see some illustrations of the sexual acts.
The music is well picked and very fitting to the tone of the scenes. The little sound effects also help to create some additional ambiance.
Overall I think there are some nice story hooks and character designs in this game, but I'd like to see the art harmonized and illustrated added for the sexual content to really seal the deal.