A Good Day to be a Dog — Characters & Cast

To break her family curse, protect those she loves, and find genuine acceptance.

Begins as an anxious teacher avoiding romance due to her curse. Through helping Seo-won overcome his fear, she learns self-worth and braves supernatural consequences to protect their love.

To overcome his childhood trauma and protect his romantic connection with Hae-na.

Starts as a distant, guarded math teacher hiding deep cynophobia. Driven by his growing love for Hae-na, he confronts his trauma and actively fights to reclaim her love after her memory is erased.

To seek retribution for the centuries-old death of his mortal love, Cho-young.

Masks his ancient identity behind a friendly history teacher facade. Driven by revenge for his lost love Cho-young, he orchestrates the curse until learning the unselfish truth behind her historical death, finally letting go.

To support his uncle Seo-won and help teacher Hae-na manage her secret.

Seo-won’s nephew and Hae-na’s student who accidentally discovers Hae-na’s dog form. He becomes their key co-conspirator, driven by loyalty to his uncle and fondness for his teacher.

To uncover the truth of her past memories and bring closure to ancient grief.

A transfer student gifted with shamanic second sight who is revealed as the reincarnation of Cho-young. Driven to uncover her past memories, she serves as the key to defusing Bo-gyeom's long-held vengeance.