I play it for the story part and the fun factor...
I want to rescue Iris already! Actually... I can't remember what drew me in the first time, I think it mention 'following your own tale' which might have be the reason.
Honestly, even if she's a fictional character, I find Iris very beautiful and want to meet her in-game. :3
"Invoke... VIRUS SOUL!!!" ~ From my VirusChris manga project