The Villainess is my Boss 2

The story starts just when a daughter of duke, Anastasia is getting engaged to a crown prince Leo. But she is not the only one, who is interested in him. There is also Kathy, a daughter of commoner, who against all rules got accepted to the royal academy for nobles.

But how are Arisa and Tomoka related to them? What happened to them after the last moments of vol. 1?

This is vol. 2, but you can still start reading it without knowledge of events from the previous book.