Main pairing: Zack/Cloud
Rating: yaoi (male/male), from PG-13 to NC-17
Cloud is the only child of Sephiroth. He dreams to become a SOLDIER, but his father is against it. So Cloud finished his studies at university and becomes a doctor. He starts to work in ShinRa hospital. There one day he meets Zack, who promises to secretly train him. That how their unique relationship was born. But Sephiroth doesn´t wish for his precious son to be with some "average" SOLDIER and especially NOT Zackary Fair. You see, Zack is Angeal´s son and Angeal and Sephiroth have an old conflict.
Cloud´s mother is unknow, Sephiroth always claimed that she/? died giving a birth. In fact Sephiroth´s mate was Genesis, but Angeal was deeply in love with Genesis too.