Bae Song U is in a one-sided love with his longtime friend, Kim Sang Jin. Living his life hiding his feelings, one day Bae Song U finds a suspicious book in his house, and written inside is Kim Sang Jin's life story. Bae Song U is just a passing extra...?! As he tries to ignore the book, Bae Song U soon realises that everything is going as written...(Source: MU)

The story of a man who brings good luck and those who get carried away. Jung WonHo, an office worker who spent a normal day, accidentally saves Ji TaeWoo from a car accident. WonHo is attracted to TaeWoo, who saw the accident as a chance to approach him, and now the two are getting closer...