Several repeatable sex scenes in the mid/late game.
I thought so too. Never really gave a shit about any of the protagonists changing in nearly every other corruption game I've played. But it's different here.
Partly because Aura feels like a human being with ideals and dreams, instead of a hyper-sexualized dressup doll who clumsily gets entangled in easily avoided sexual scenarios.
Partly because both the main and support antagonists are
real pieces of shit, and advancing towards the corruption ending is essentionally letting them win. And you don't want to see them win.
Partly because it's not just sexual. It's not just about breaking down Aura's inhibitions, and wanting her to bone nearly every dude in sight, although that is part of it. You are practically watching the death of a person in slow-mo. Her hobbies, her friends, her dreams, her idealism. It all gets broken down, and changed into something unrecognizeable. It's pretty sad if you go all the way.
But I digress. Play it yourself, and make up your own opinion.