Regardless of what the school's punishment is, she's failed really badly and is going to suffer a hit to her reputation. I have no doubt the prince is gonna drop her without hesitating. And being engaged to the prince seems to be the most important thing in the world to her.
Dad: "your mother and I both have work problems so why don't you take Kana and maybe hold hands some and maybe work a kiss in there by the same time next year when your mother and I will have more work problems and then a few years from now when your mother and I will have even more work...
"It's not actually important, I just felt like pointing it out."
Magic Tamagotchi is great, but I still think nothing beats the protagonist of My Secretly Hot Husband inventing Fantasy Bitcoin and using it to scam a greed demon