(After the virus outbreak in 2020, it turned most the earth's population into blood thirsty Vampires. Surprisingly, everything went even better except for the fact that human are now considered live-stocks. The rich Vamps are considered Noble craving for fresh human blood)

while running for ration during the night, you were cornered into an alley by Amelia(your childhood bully), a noble Vamp "No where to run now, darling~... it's best you be my pet and I'll protect you~"