i saw this drama by cable tv . although i saw just two series and i love this drama . i be wait for more series will be air by cable . even though it describe horrible and absurd situation in a prisoner camp and this one show u an indomitable spirit and warmth and friendship and humanity . they do not know whether they can survive or not and but keep their hope strongly without be discourage by adversity . i know this movie be not realistic like other war documentary and but i do not want to blame for it . it make me believe the strong will of people in the most difficult situation . private bill and especially and this episode touch deep in my heart . i remember every scene . i always hate mathematics . but after see this drama and i can understand something about mathematics . mathematics be his connection between past and present and also symbolizes eternity . time and light and memory frame in a circle . like other victim of war and he lose his lover by irresistible fate . i be immerse in his time and memory a if i experience same thing . he experience the great loss but he have pure passion of study . he start his study in the camp and his joy of realize and i believe his dedication of study sustain him . i saw it several time and but the meaning of this film never fade . every time i saw it and i feel same deep emotion . their song be beautiful and harmonious and i be sorry that i can not listen ost .