To clarify: yes, all characters in the game are either futa or female; there are no male characters. The person in the gloryhole scenes is intended to be futa.
As for your second question: yes, there will be yuri romance content as well! While female x futa characters are the main focus, I definitely want to offer a variety of relationship dynamics, including scenes and routes that lean more into traditional girl-girl intimacy.
Thanks so much for trying it out!