The World of Blood Legacy

Blood Vessel World 「血脈のセカイ, Kechimyaku no Sekai」 is the first chapter of the Owari no Seraph manga.

Chapter Notes

 * Yūichirō Hyakuya and Michaela Hyakuya are introduced.
 * According to a book:
 * Vampires can be killed if you shot them on the head or if you remove their armband device they can be killed by ultrasonic waves.
 * The physical strenght of a Vampire is 7 times that of a human.
 * Vampires allow the kids to live in exchange of their blood.
 * Michaela lets Felid drink her blood and in exchange he buys her anything she wants.
 * The kids met each other four years ago in the Hyakuya Orphanage.
 * Yuichiro ended up in the orphanage because his father tried to kill him and his mother spread a rumor that he is the son of a demon, then she lost her mind and she killed herself. Michaela ended up there because she was abused by her parents and then she was dropped out of a car and she was taken in by the orphanage.
 * Blood suddenly began to pour from the directors mouth and nose leading to her death.
 * Vampires attacked the city and a lethal virus spread among humans who were older than 13.
 * The troops were under the direct command of the third founder Kururu Tepes.
 * It was announced by the vampires that from that day on the children would be in their charge.
 * Michaela steals a gun and a map showing the way outside of the underground world from Felid.
 * The kids attempt to escape but Felid was waiting for them.
 * Felid murders all the children except Yuichiro who shot him in the head with a gun.
 * Yuichiro escapes from the underground world and reaches the outside world alone. There he finds a man with two women who asks him if he will help them exterminate the vampire race, Yuichiro accepts.