Han Hana, a schoolteacher burdened by a peculiar family curse, faces a dilemma in her romantic life. This curse triggers a transformation into a dog every night following a kiss, a fate she seeks to evade by abstaining from such affections. However, a drunken encounter with her seemingly antagonistic colleague, Jin Seon, leads to an unintended kiss, unraveling the curse. To undo the spell and return to human form, Hana must share a second kiss with Seon, who harbors an intense fear of dogs, complicating her quest for liberation.