hakika has a real talent for writing the stories that span over several games in a way that makes you literally go fan-girling over the smallest details. The Blight is probably the strongest one in this way, since it serves as a connection between the earlier non-H games and the new H Sequel&spinoffs line of games (it's literally member-berries every few steps - Rifar, Arknoah, Parasite, Town of Gears, Sunlamp/Manaspire, Willem Mesa, Rafata etc.). The later games have less connection with pre-H games and more intertwined between each other, so again I'd strongly recommend you to actually replay the games by yourself to avoid missing on some smaller details.