Strength of the Game is in its Dialogue and Characters
Power Vacuum is one of the more interesting games I've played. The setting, characters, and plot are things I've seen before - landlord and her wards live with protagonist and get engaged in lewd shenanigans. The big difference between this game and the others is how skilled the developer is at writing. The dialogue and how each character adheres to their personality is phenomenal.
The milf mom, for example, acts the closest to what a real milf mom would do - she is strict about her kids doing chores, but likes to joke around, she is loving, provides advice, doesn't like when the kids push inappropriate boundaries, etc. This same fidelity to character role is applied to everyone and it makes the lewd scenes all that much better for it.
The dialogue between the characters are great. Whenever there's a conversation there is a variety of sharp banter, interesting insights about girls (and guys), and humor. Some of the earlier writing had slight pacing issues as flow of the conversation was a bit fast, but I didn't have any issues later.
I also want to mention that the developer is taking it slow with the lewd scenes. There is sex, but the main love interests currently are in the middle of being completely seduced. I think the slow pace fine and fits with the core of the game.
I don't think my review does justice to the strengths of the this game and why you should check it out. The best way I could describe it would be comparing it to a D&D game. A good D&D game needs all the characters to act out their roles convincingly and interact with each other in interesting ways. This game does that superbly.