Jun-hyuk
Jun-hyuk is a high school student who has a crush on his classmate, Yoo-jin. However, Yoo-jin is interested in another boy, and Jun-hyuk is left heartbroken. One day, Jun-hyuk is walking home from school when he sees a dog being abused by its owner. Jun-hyuk intervenes and saves the dog, and the two of them quickly become friends. The dog, named Ae-ri, helps Jun-hyuk to heal from his heartbreak, and the two of them eventually become inseparable.
One day, Jun-hyuk and Ae-ri are walking in the park when they see Yoo-jin. Yoo-jin is surprised to see Jun-hyuk with a dog, and she is even more surprised when she learns that the dog is Ae-ri. Jun-hyuk and Yoo-jin start talking, and they eventually realize that they have a lot in common. They start dating, and Ae-ri is happy to see that Jun-hyuk has finally found someone who makes him happy.
Jun-hyuk, Yoo-jin, and Ae-ri continue to be friends, and they have many adventures together. They go on hikes, play