This is one of my favorite NTR games I've ever played and there is no CG. I think that is a testament to the games writing. It's a typical JRPG with 2 heroines to pursue. Both of which have NTR routes. There is true love routes available as well and sometimes it feels difficult to get on the NTR routes. This system is great cause I feel it makes the NTR hits harder as it is due to the main character's own mistakes that things turn out the way it did.
As I've said there is No CG but there is a slight amount of pixel animation and sounds to accompany the scenes. The actual scene will turn into a novel like scene. Although I like CG, the build up to the scenes is what makes it great to me.
Good luck to the developer and hope to see more.