As drugs made with Alphas' blood, which is said to have the best aphrodisiac effect, are distributed everywhere, Ace Jess from the Drug Enforcement Administration is assigned to the temporary protection of Lily, one of the few Dominant Alphas in the world, for the time being. While working as a babysitter, a job Ace is totally not cut out for, Lily’s rut happened to come?!! “I mean, I’m just helping out a sick kid…”