Yes, there is certainly a lot of scope for a sequel. ^_^
But I know some people aren't as keen on sequels as they have their own ideas how they want the story to have progressed after they finished it, and I can understand that.
What I will probably do is finish the three games I am currently working on (Heaven's Grave, Best Friends Forever and short free game I haven't published the project page for yet). Then I will give people a choice to help me decide which project I will work on next, and a sequel to 'Rose' will be one of the choices.