The Arc of Chiro (Blood+ Fanfic)(Boyxboy)
If one were to assume that Chiropterans were immune to anomalies passed down through genetics, they would be wrong.
Arcturus is one such anomaly. He was born, well, male. His mother died in the twins' birth, and the father hunted down after the reveal. However, the other child was still female. Allowing his sister to do as she pleased, Arcturus turned a blind eye to time. Even her disappearance many years later did not shake him.
He watched with bated breath, the battle of her children, Saya and Diva. Praying silently they would notice him, see him for what he was, and end. Yet such things are not to be. After the death of Diva, his gaze traveled away once more, and Saya's family became ignored.
His story is not over. For in that brief moment of watchfulness, someone noticed, documented, researched. And found the truth.