Does anyone know the OST being played at 18:09 on episode 30 of The Familiar of Zero? The episode has an old fashion dancing ball with magic dancing dolls as Saito is hiding from Louise. Thiers a harp and maybe a violin being played in the background, I watched the show around 5 months ago but I've never been able to find the OST even after listening to hours of Zero No Tsukaima Playlists. I might have missed out on some songs on the playlists since it has so many OST throughout the 4 seasons.
So please anyone that can find it please do, I really like this OST