A Good Day to be a Dog

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.

A new student, Ji-a, transfers to Garam High School, and she turns out to be a shaman. She notices a different energy around Hae-na and Bo-gyeom. Hae-na fails to kiss Seo-won, so she has to seek her chance during the school trip. Meanwhile, some of the students sneak out at night, so Hae-na ends up going outside to look for them, risking herself to be exposed.

Yu-na’s ex-boyfriend posts Hae-na’s secret online. Eun-hwan, who used to bully Seo-won in high school, sees the post and covers the story. Hae-na’s mom finds out about her transformation and demands to know who Hae-na’s boyfriend is. Hae-na decides to tell the truth to Seo-won and ask for his help.

Kang Eun-hwan blackmails Hae-na, saying he’d expose her secret unless she gives him all her savings. Upon hearing what Eun-hwan did, Hae-na's parents invade his place and find the recordings and photos he took of Hae-na. After seeing what Kang Eun-hwan posted online, Seo-won goes to see him, but he gets tied up instead.

Hae-na and Seo-won start dating officially, but they can’t show it at school because of the recent PDA incident between the teachers at a neighboring school. Although Hae-na and Seo-won try to be subtle at school, a few people notice a romantic vibe between them. Meanwhile, Ji-a does a card reading for Bo-gyeom and finds out who he truly is.

The mountain spirit saves Lady Han who was being chased by government officers. During the chase, the baby in Lady Han’s womb dies, leaving her in despair. Mak-soon, Lady Han’s servant, stays by her side and looks after her. The mountain spirit and Lady Han grow closer as they spend more time together. One day, the mountain spirit senses swordsmen in his mountain searching for Lady Han.

Hae-na’s uncle, Dong-chul, comes back to his human form. Hae-na’s family finds it strange that his curse got lifted when he hadn’t gotten a kiss. Bo-gyeom reveals himself to Hae-na and tells her that he was the one who put the curse on her family. Then he goes on to tell her that he’ll lift the curse only if she gives up her love for Seo-won.

Instead of Seo-won's memories, Hae-na's memories of him get erased, making Seo-won despair. Seo-won does his best to win Hae-na's heart again, but it doesn't go as well as he expected. However, Seo-won finds out that Ji-a still has memories of him and Hae-na dating. Meanwhile, Ji-a visits the mountain she died in her past life, which upsets Bo-gyeom.

Hae-na keeps getting reminded of the memories she had with Seo-won. After Seo-won kisses her, Hae-na becomes sure that she and Seo-won shared certain memories. The mountain spirit finally realizes what happened to Cho-young and that he was mistaken all this time. He decides to return the memories to Hae-na.

After finding out everything about the curse and their past, Hae-na and Seo-won realize how they feel about each other. One year has passed, and Seo-won’s birthday is only ten days ahead. Hae-na wants to give him a present that is unexpected but meaningful. She prepares a special present and plans to give it to Seo-won at the school festival. However, an uninvited guest appears at the school.