Vchera

Vchera Bulgarian , English Yesterday is a 1988 Bulgarian film.

The soundtrack was composed by Kiril Marichkov. It consists of a track called Utroto, which only appears in the film during the intro and at other points in slower instrumental versions, and a track called Kletva, which appears in a scene where the students take a blood oath and in the end credits. Kletva was later rerecorded in 1996 and included on Marichkovs solo album Zodija Shturec and several Shturcite compilations, while Utroto has never been released outside of the movie.

Source: Wikipedia