九亿少女的梦七千宅男的情
[jiŭ yì shăo nǚ de mèng qī qiān zhái nán de qíng]
It translates to 'the dreams of nine hundred million girls and the feelings of seven thousand otakus', which conveys a broad romantic appeal that many admire, reflecting widespread charm or adoration. It may suggest something widely fantasized about.