I'm glad you love it that much! Thanks!
Just right now I'm working on a new version of the game that will include a new sex scene for male Rin ;)
I didn't understand what you mean with: "can you more spell that Rin or other girls turn into different girls".
And about age progression and regression spell, I will think about it; just letting you know that the minimum age for characters will be 18 years old.