Ryu is a skilled young writer who has a girlfriend, 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 Arm, 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, Arm goes all in caring for him and the two decide to live together.　　However, the world is always cruel. When Arm and Ryu learn the truth of something that tears them apart, Ryu disappears from Arm's life. Arm tries every means to find Ryu without any luck, until finally, Arm gets a box. This box contains all the answers.。“原来如此。”顾独行笑了起来，心结尽开，笑得很满足。心中，悠然升起一种“英雄所见略同”的感觉。这等名剑，本就不是买卖之物啊。哪怕楚阳因此而动了些心机，那也是因为看重自己啊。……