Otome games for the Iphone 4, torrents?

I just got an Iphone 4 and the Otome games seem fun like Pirates in Love or My Forged Wedding. I've seen where I can get the app so I don't have to pay 3.99 per character (ridiculous!) but I don't want it to be some sort of virus. What type of damage could that do to my phone? Does anyone know of any reliable methods?