Yeah with lust theory's story premise there isn't much room for any real progression on the characters and relationships since it resets.I'd say this is better than Lust Theory, mostly because Lust Theory just feels like random sex fest with really vague story behind it. This is more story driven AVN, and not so heavy with random banging.
But how much lewd content is in this game? Don't like games where there is too little either, a good balance is needed. And I need to play the first part right?