While walking down the street with a friend, Dami accidentally swallows Woo-yeo's fox bead. The next day, Dami moves in with Woo-yeo, hoping to find a way to return the fox bead to him.

Dami is shocked knowing that she could die if she fails to get the fox bead out of her body within a year, and Woo-yeo writes a contract to protect Dami and the bead. Dami struggles to survive in college among Tiger men.

Woo-yeo discovers a strange reaction of his bead to the woman where it’s currently settling. He also finds himself connecting to her emotionally, as Lee Dam empathizes with him as well.

Dam feels love for Woo-yeo, and Woo-yeo, who was trying to keep his distance, also begins to feel special feelings for Dam. Woo-yeo is suspicious of a murder case in the downtown area that has become a issue.

Dam is disturbed by the thought that Woo-yeo doesn't understand her feelings. Dam goes on a blind date with a disturbed heart, and Dam's mother visits the house where Woo-yeo is left alone.

Just when Woo-yeo decided to let go of Dam, an unexpected person appears to be after Dam, he decides to keep her next to him for a little longer.

Woo-yeo feels bitter and empty watching Dam lives on without him; Dam recalls something as Seon-woo confesses his love to her.

Dam is bothered that she kept on running into the professor Woo-yeo yet is curious to find out the relationship with him and Hye-sun.

As Woo-yeo begins to feel hungry, Hye-sun tells him that keeping himself from physical touch would ease the hunger; Woo-yeo tells Dam to keep a distance to prevent his spirit from losing.

Woo-yeo feels bitter about the thread of fate that Dam and Sun-woo share but pretends to look calm; Hye-sun gets in the way of someone unexpected.

Woo-yeo dreams of going on a date with Dam just like every other human but soon he is self-conscious about his real self.

While Dam is indecisive about the breakup with Woo-yeo, she hears from Hye-sun that Woo-yeo's bead has turned blue.

Dam searches for a way for Woo-yeo to become a human and moves in together. Woo-yeo finds it difficult to share his every minute with Dam.

Dam can't seem to get off her mind from what happened last night and feels the need for a new label with Woo-yeo; as Woo-yeo's trick fails more often, he assumes that he's becoming a human.

Woo-yeo tells that it's close to an end, and Dam misunderstands it as to Woo-yeo is getting close to being a human.