It's lucky that Orion is chock-full of personality, because your character is unfortunately something of an empty box of a Bella Swan. Story-wise, it's a side effect of getting her memories and her personality knocked right out of her, but she's incredibly passive in many of her interactions with all the pretty boys... sometimes a little too much so, especially considering how many dark turns this story can take.
This game makes no bones about the fact that it packages up a crazy, controlling, and stalkerish boyfriend into the most perfect romance ever - but heck, as we've learned with Twilight, that's just A-OK with North American audiences these days.
That doesn't make the story any less compelling or interesting to learn about fully by playing through all the different possibilities and endings. It's also what attracts other players aside from its usual target market of women wanting to romance good-looking men who see a strange, occasionally twisted story, and want to learn more about it.
And you never know what can happen - trust this guy and he may kill you. Or lock you in a cage. Because he loves you.
(Remember, it's a story. Not your story.)
The game is fully voice-acted and its production levels are through the roof with gorgeous art and hours of replayability. It also incorporates a set of mini-games (who doesn't want to play rock-paper-scissors with their true love?) and a little more gameplay than is the usual wont in the visual novel experience.