Ace vampire hunter Yoon Su-hyun works for the Vampire Hunter Bureau. Because of a childhood trauma, Su-hyun has trouble trusting people, leaving him isolated within the team—and even his teammates try to avoid him. “One again, huh? Us.” Then one day, the man he swore he’d never sleep with twice suddenly joins Alpha Team… as Su-hyun’s junior. And to make matters worse… They’re forced to live together under the same roof?