Based on the 1st and 2nd volume of the manga "Lament of the Lamb", by Kei Toume, it goes though one of the main characters in the story, Chizuna, compare her father and her newly-found brother Kazuna (If you can’t see the difference between them Kazuna is most likely the one who looks younger and more frightened), and how among many people only the two of them seem to only obtain her full love and compassion. Extra details at the end of the video. Thanks for watching :)