This is a very difficult game to rate properly, because the whole is significantly less than the sum of its parts.
The character work is outstanding; the characters are memorable, enjoyable and well crafted. The dialog is good. The music is fun. The gameplay is simple but offers a lot of variations based on your choices. The sex scenes are varied and enticing. The plot is extremely well crafted. A lot of work clearly went into every facet of this game.
That's why it's such a shame that the game is its own worst enemy. First, the story deliberately misrepresents itself. It wants to come across as a standard hook-up-with-multiple-women sex farce, only to drop the boom later when you face consequences for your actions. That, I think, would have been fine on its own.
Unfortunately, the game doubles down by having 'real life' tragedies intervene to ensure there will be no totally happy endings, then quadruples down by completely shifting focus in the final stages; it practically wallows in the misery it inflicts.
The final two acts of this game are literally the main character struggling to come to terms with the actions of an NPC that, from a narrative perspective, came straight out of nowhere.
The end result is that as much as I normally love playing around with alternate endings, I actively want to avoid playing this game again. The desire to see alternate sex scenes feels... almost exploitative given how utterly dark the journey to get them will be. The desire to see how my actions could change things is undercut by the knowledge that, in the end, my actions aren't the ones driving the story.
I can't help but feel this speaks to a fundamental failure of Acting Lessons as a game. I do not regret playing this game. But I'm pretty sure playing it again would only decrease my enjoyment, and I don't think I could really recommend to anyone sight unseen.
I'm giving it a final rating of Average, but this is anything but a typical game.