An unusually good Keinako story, where it turns out that Kanako has a series of unusual seals on an unknown power within herself. As the seals break, it is revealed that she is a half-demon, and Keitaro is a half-angel that has power over her dark side. While Keinako is unusual in and of itself (Incest Is Relative, after all, even if Not Blood Siblings are involved), this one flows just right to pull the two together in a way no one can begrudge.
FanficRecs Comment by Shadic The Hedgehog
An unusually good Keinako story, where it turns out that Kanako has a series of unusual seals on an unknown power within herself. As the seals break, it is revealed that she is a half-demon, and Keitaro is a half-angel that has power over her dark side. While Keinako is unusual in and of itself (Incest Is Relative, after all, even if Not Blood Siblings are involved), this one flows just right to pull the two together in a way no one can begrudge.