Virgin_FOR_Life_'s manga / #Ending made me sad/MAD.. I WANNA DYE NOW(1)

A world where vampire govern humans! Welcome to Blood Bank, it's filled with fresh blood. One is a hard-working banker and isn't affected by vampire pheromones. One day, Shell, the son of an overlord comes to visit for inspection. During One's report, Shell keeps staring at One. And later... follows him to the toilet!