미로 (miro) literally means "maze" or "labyrinth". It's a fantastic word that isn't used in everyday conversation, making it a unique find in a song.
In "Ditto", the word stands alone, emphasizing a feeling of being lost and confused. It perfectly captures the uncertainty of a crush, wondering if the other person feels the same way, like navigating a complicated maze of emotions.
Have you ever been stuck in that nerve-wracking stage where you like someone, you think they like you back, but nobody wants to say it first? That is the exact mood NewJeans brings in "Ditto." The singer is tired of guessing games and mixed signals. When she sings, "Stay in the middle / Like you a little / Don't want no riddle," she is asking her crush to step out of the safe, ambiguous zone between friends and lovers. The English word "ditto" simply means "me too" or "same here." Instead of playing along with confusing hints, she demands a clear answer before the night ends: "말해줘 / Say it ditto" (Tell me / Say 'me too'). Morning feels way too far away ("아침은 너무 멀어" [morning is too far]), and waiting hurts.
Notice how the lyrics show her heart racing right out in the open. She describes the thrill with the sound effect "라타타타 울린 심장" (my heart beating rat-a-tat-tat). She admits that summer has slipped into autumn ("어느새 여름 지나 가을" [before I knew it, summer passed and it's autumn]) while she waited around. She also rejects the confusion by saying "I don't want to / 미로" (미로 means "maze"). She refuses to get trapped in an emotional labyrinth. It is a sweet, direct plea for honesty: she is ready to risk admitting her feelings ("널 좋아한다고" [that I like you]), so she wants to hear the exact same words returned.