Oh I've never heard that term, these kind of VNs are pretty cool!
The closest to something like that is Beast Control. I want it to have a deeper story with more characters. Hopefully next year I can get back to making it
What I meant by open world VN is like the immensely popular Lustful Desires game or even Hornstown - basically games that let you explore areas on a custom map. Beast Control (which the deepest level I got to was 17 and I absolutely love the Oni image) reminds me a lot of Grove (another incredibly popular and wonderful game with Open World elements).
Between the Beast Control style game and the Cumdy Werewolf (and other creatures) and even the Grinding Club, I think you could make a (extremely ambitious) great open world style VN out of it. :D Just food for thought. ;)
Ohhh I see, Lustful Desires and Grove are super fun!
I wanna commit to a bigger project in the future. I had to make smaller games like Grinding Club and Cumdy to learn a bit more and get my expectations right about gamedev. I appreciate that you would consider playing a longer game of mine Khevor! In the future for sure :D