They haven't revealed what the contract entails so we don't know for sure. I can guess it has something to do with their living together and the fact that they are both actors. Something like "I'll help you with your acting, in return you give me your body" type of deal. I could be wrong.. ヾ(☆▽☆)
Dating contract so probs something like pretend lovers. Aka they say they are pretending but they are gonna act like full on lovers. In the end they'll both love each other.
I am really dumb. I don't get what that contract is for. Can someone explain the plot?