Thank you for your question and your concern. "Teacher x Student Romance" is listed under the Content Warnings in the description on the game's main page because that content can make people uncomfortable. In a future update, I'll be sure to add the content warnings in the game itself as well.
The answer to your question may make you no less uncomfortable, and I don't think having that information will put your mind at ease because the Teacher-Student relationship between Spine and Apollo is still implied and present in the prequel.