Throughout the series, "Another Miss Oh" explores themes of self-discovery, love, and friendship. Hae-young, with her new body, gains confidence and a fresh perspective on life, while Mi-kyung, in Hae-young's body, learns to appreciate the value of hard work and genuine relationships. The two women form a strong bond, supporting each other through their respective struggles. The drama also delves into the complexities of romantic relationships, as Hae-young and Mi-kyung navigate their feelings for the same man, Choi Do-hyun (played by Kim Ji-hoon).