Imagine your otp as assigned partners in a duet they must sing together.
Imagine it’s their first time singing together. The music starts playing and Person B sings the first parts of the song. Person A, entranced by Person B’s beautiful singing, forgets to come in to sing the next part. It isnt until the music stops and the silence when Person A realizes they didnt come in to sing. Person B laughs and asks, “You okay?”
Person A is blushing like crazy and realizes oh god theyre in love