Overall, I enjoyed what I have read so far. I really like Zach (although I'm biased cuz sharks are my favorite!) , especially when you consider the rarity of shark characters in VNs. Aside from a few grammatical errors and some minor syntax issues, The writing is very well done. I enjoy the premise of the novel, and I could easily see some interesting story elements :). It is my belief that this VN has a lot of potential. Keep up the good work!
If you'd like, I can provide a more in-depth review/ constructive criticism