Unlike other Omegas, mercenary Nox can't give off a scent and has a nice, strong body.He accepts a request from the Wizard Tower then goes to catch Lucian, the wizard who is living secluded in the forest.But he ends up being bewitched by Lucian's strong pheromones and entrusting to this man his body, which has grown hot..."Oh, you are an Omega? You give off a nice scent." Lucian weirdly feels a strong excitation to Nox's scent while Nox is hit by an heat cycle though he hasn't had one for 11 years.Lucian, full of curiosity, offers a big reward and proposes a "research contract". Their cohabitation starts for the "pheromone research contract" but is this... really only for the purpose of research?

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