凉薄少年亦良心凉意
[liáng bó shăo nián yì liáng xīn liáng yì]
'Cool-hearted Boy With Even Cool Conscience'. Here 'cool-hearted' is not to be understood as 'rational', but instead it's closer in meaning to 'indifferent' or even 'unfeeling', which describes a person that does not show emotion and does not care much about other's feelings