少年暖眸白衬衫少女冷瞳碎花裙
[shăo nián nuăn móu bái chèn shān shăo nǚ lĕng tóng suì huā qún]
The phrase describes a scene: 'a young man with warm eyes wears a white shirt, while a teenage girl with indifferent eyes wears dresses with a floral pattern'. Through this idyllic description, it seems like this nickname is intended to express a yearning for purity, youth, simplicity, and contrast between warmth and coolness.