"Ditto" by NewJeans is a song about wanting a romantic relationship with somebody special, but not wanting to take the risk of losing them. The lyrics describe being in a "middle ground" of feelings, wanting and needing the other person, but not wanting to be too vulnerable. The chorus repeats the words "say it back, oh, say it, ditto" implying that the singer wants their affection to be reciprocated. The overall message of the song is to take a chance with love despite the risks, and trust that it will be worth it.