Mio Karino, working undercover as a secretary, keeps his omega identity hidden from his boss, Nagao Keisei, who holds a biased outlook towards omegas. Although Keisei's lack of trust humiliates Karino, he still seeks to gain his employer's approval. However, when Keisei learns of Karino's true status, he hastily banishes him. With limited options, Karino resorts to taking medicinal aids to regain Keisei's favor.