Ryu is a skilled young writer who has a 女孩friend, Pin, who he's dated since high school. They love each other and plan to marry. But perhaps because of Ryu's fate, he loses her forever in a car accident. Ryu blames himself. He withdraws and starts leaning on alcohol. With the arrival of 嗄rm, the grandson of the owner of the company where Ryu works, and their gradual relationship, Ryu's world begins to brighten again. When Ryu finds out that he has cancer and may not have long to live, 嗄rm goes all in caring for him and the two decide to live together. However, the world is always cruel. When 嗄rm and Ryu learn the truth of something that tears them apart, Ryu disappears from 嗄rm's life. 嗄rm tries every means to find Ryu without any luck, until finally, 嗄rm gets a box. This box contains all the answers.