“Promise”讲述的是爱上一个人，渴望向对方倾诉心声的感觉。正如KAZE自己所说：“我在做一些特别的音乐，除非用心去听，否则人们无法预知其中的奥秘。” 这首歌的副歌歌词略显沉重，而节拍则轻快活泼，试图形成对比，创作独特的音乐氛围。该单曲是在KAZE的首张迷你专辑 “Love Renaissance”以及主打歌曲 “Deposit”和 “Sweet Cream”发行之后，KAZE给我们带来的又一首惊喜之作。 "Promise" is about the feeling of falling in love with someone and wanting to express your innermost feelings to them. As KAZE puts it, "I wanted to make something special, where people couldn't predict the hook." The lyrics of the chorus are heavy ("promise me if the world is ending that you'd stay here with me"), while the beat is bouncy and light, trying to make contrast between the lyrics and music. The single follows KAZE's debut EP, Love Renaissance, and focus singles "Deposit" and "Sweet Cream."