In a world where supernatural abilities determine social standing, My Happy Marriage follows Miyo Saimori, a young woman born without magical powers who is treated as a servant by her own family. Forced into an arranged marriage with Kiyoka Kudo, a cold and feared military commander rumored to have driven away previous brides, Miyo expects only more cruelty. However, as she begins her new life in his household, she discovers that Kiyoka's harsh reputation masks a gentle and protective nature, while her own hidden past holds secrets that could change everything. This romantic fantasy series blends Cinderella-like themes with a richly imagined Taisho-era setting, exploring Miyo's journey from oppression to self-worth as she learns to trust and love. The show balances tender character development with supernatural intrigue, creating a poignant story about finding happiness in unexpected places.