Hana is a high school teacher cursed to transform into a dog whenever she kisses someone – and reverting back only if kissed again in her dog form. During a night out after work, , she accidentally kisses her colleague Seon Jin, who harbors a deep fear of dogs. As Hana tries to break the curse, she also works to help Seon Jin confront his fears, leading to a heartwarming and humorous journey of love and self-discovery.