Thanks for your feedback!
Regarding the ending song with the other names: They are famous "tsundere" type girls from famous anime and VNs.
About AI use: So far, my other VNs have not used AI for the story writing. That was definitely an experiment in Dere Quartet. It was half-successful, I would say: The AI had some pretty good ideas and is writing more natural English than me, but it lacks coherence and direction, so I would only use it as a helper tool in the future.
I have one VN without any AI use: The Last Secret.
That one was done before AI could contribute anything useful. The graphics are – not as good, but it's okay if compared with other non-profit projects, and the VN got very good ratings on Steam. You might want to give it a try.
It's set in the same universe as Sweet Science, by the way, and the connection between both will become more visible in the third part of the trilogy "Kieta memory" on which we are working right now. (Test players welcome!)