Hae-na has a crush on one of the male teachers at her school. After a few drinks at a get-together with the teachers, she discloses her feelings to him. However, after she kisses him, she realizes it's Seo-won, the man she can never get close to.

Hae-na finds out that Seo-won is afraid of dogs. It complicates things as she has to get a kiss from him while she’s changed to a dog. The vice principal brings his dog to work, making Seo-won panic. Hae-na secretly helps Seo-won so that no one finds out about his secret fear of dogs. Meanwhile, Yul witnesses Hae-na transforming into a dog.

Hae-na decides to ask Yul’s help and let her into his place while Seo-won is asleep. She kisses him while she’s in her dog form, but the curse doesn’t get lifted. Later, Hae-na finds out that Seo-won has to be conscious when she kisses him for her curse to be lifted. To do that, she decides to help Seo-won overcome his fear of dogs first.

Seo-won witnesses Ji-won getting bullied by her friends. To secure the evidence of bullying, Hae-na steals the bully’s phone while she’s transformed into a dog. An anti-bullying committee meeting is held to punish the bully, Jae-hee. To take revenge, Jae-hee decides to falsely accuse Seo-won of sexually harassing her.