Seung-ryong owns a small toast shop, who is sick from taking in briquette gas in the past after his parents died. One day, his first love comes back to Korea, and they become close. However, he finds out that his little sister is sick.
In this endearing supernatural love story spanning two decades, a university student finds himself communicating with a female classmate from the same school through an antique ham radio.
Eun-soo, a librarian watches for book vandalism that currently happens in the library. One day, she catches Jun-oh tearing off certain page of books. Eun-soo accuses him of vandalism but soon discovers the complex story behind his actions. Jun-oh’s girlfriend suddenly leaves him with only a mysterious note. “Look up page 198”. Jun-oh’s girlfriend was a bibliophile and she checked out books regularly at the library. Jun-oh goes to the library and tears out page 198 from every book he comes in touch. As Eun-soo has just broken up, she gives him an advice saying that he has to let her go if she really meant it. However, looking at Jun-oh torn apart by his love, Eun-soo starts to help him decipher the messages on page 198 of all the books .
Little Seung-jae stays up all night and writes letters to So-hee, pretending to be her father in Mars. Leaving Seung-jae's innocent heart behind, So-hee leaves for a big city. Both grown up to be adults, Seung-jae is a postman who writes letters to So-hee's grandma - the letters that never came from So-hee. So-hee's heart hardens after hardships in life and she comes back to her hometown and Seung-jae's heart swells up again at seeing her again...
On a snowy night, little Seon-mi is diagnosed with hemopoietic dysplasia. Years pass and Seon-mi, who has now become an adult, has overcome her pain and is adjusting to the adult world. Having decided to use her talent to become a perfumer, she travels to many different places to collect various scents and spices to help people with their inner pains. She meets Sang-woo at an aquarium and is strongly drawn to his scent which reminds her of her father.
Ji Eun-Soo is a daughter-in-law of a powerful chaebol family. She suddenly she becomes a murderer, who killed her husband. After she is released from prison, she tries to get her daughter back. She approaches Kang Ji-Min, who has adopted her daughter. He is a cool as ice reporter. Ji Eun-Soo pretends to fall in love with him and attempts to marry him to become the stepmother of her daughter.
Eun-ho, a free-spirited gumiho, avoids good deeds and romance to steer clear of becoming human. Her carefree life takes an unexpected turn after a fateful encounter with a self-absorbed soccer star.