薄情薄意少年无情无义凉情凉心姑娘百毒不侵
[bó qíng bó yì shăo nián wú qíng wú yì liáng qíng liáng xīn gū niáng băi dú bù qīn]
The name contrasts a heartless and indifferent young man with a hardened girl who is resistant to all influences or harm, depicting their apathetic or emotionally unscathed demeanor.