"A Long Night" (너의 밤은 아프지 않기를) is a song by HYUK, a member of the South Korean boy group VIXX. The song talks about a person who is longing for someone they have loved and experienced pain with in the past. The lyrics portray the emotions and thoughts of the protagonist as they spend a long night reminiscing about the past and unable to sleep. They express the yearning and longing for the person they loved and the pain they went through together. Despite the long nights and heartache, the protagonist wishes for the person they loved to have peaceful nights without pain. The song captures the bittersweet emotions of nostalgia, love, and longing. It portrays the complex emotions that arise from a past relationship and the desire for the other person to find happiness and peace, even if it means sacrificing their own. Overall, "A Long Night" reflects on the emotional journey of love and the wish for the other person's well-being despite the pain experienced in the past.