The Princess of Convenient Plot Devices, Vol. 3 (light novel)

After seeing Rust Byrne’s startlingly familiar face forces Octavia to relive a terrible memory, she finally gathers her wits. However, the junior ball isn’t over yet. There’s no time to think about alternative (fake) boyfriends, because anti-royalists have infiltrated the party, and their targets are Octavia and Sil! Never mind her own safety—Octavia must protect her OTP. She races to Sil’s side, but will she make it in time?!