合鍵
五輪真弓 Lyrics

The song 合鍵 by 五輪真弓 talks about a woman who is alone and staring at the window of her former lover's apartment. It is late at night, and she is standing outside in the shadow of a streetlight. She cannot go back to that apartment anymore, and she feels that the beautiful days they shared are now buried under the broken bond of their hearts. The woman sees her lover's silhouette in her mind and feels a coldness that surrounds both her lover and his abandoned car in the parking lot. She admits that she still does not understand what went wrong with their relationship.

In the end, the woman was overwhelmed with nostalgia and revealed that being given a copy of the key was a kind of forgiveness for her. She wanted to open the door again and see her lover. However, she couldn’t do it anymore, as the keys symbolize a relationship that is already beyond repair, and even if she gets a chance, her lover and the relationship may be gone forever.