ABO When the Morning Light Begins to Rise

In the year 1327 of the New Calendar, a virus nicknamed "Ghost" spread silently on the Crimson Star where humans immigrated. The only survivor, Albert, was sealed at the Academia Sinica in the capital as antibody research material numbered Geist-0. Eleven years later, a group of members of the "Apocalypse" organization attacked the capital. The Crown Prince Major General Ovid Marvel, who was also the captain of the Lingyun Fleet, received an order to take custody of Geist-0 and became Albert's nominal father... At dawn, he opened his eyes and saw his lover who was always smiling at him.