我就是你的少年你就是我的少女
[wŏ jiù shì nĭ de shăo nián nĭ jiù shì wŏ de shăo nǚ]
I'm your boy and you're my girl. It indicates innocence and a young romance. The words convey an intimate relationship where each side plays youthful roles to one another, like a fairy-tale narrative.