******I do want to point out i don't think there is anything wrong with wanting to make a porn game of a story you like. It is basically a harder version of fanfiction at that point and the dev obviously puts a lot of work into making things look good.
if you copy someone's work and then change the ending that's still copying someone's work. This is not to say that there is not original work in here i think the character's designs he went with are 100X better than anything in that anime. (sky is bae and ill shank anyone who dares hurt her). and I love the stuff with lily and Gwen, Both of which are not in MkR but the Main Cast(being pig's foot, oops I mean piggy and Aki, oops i mean Aine.) are both far less interesting than in Mkr. So at that point, i would rather just get the pics of this game and then go and watch Mkr