单纯尐姐迷人先生
[dān chún jī jiĕ mí rén xiān shēng]
A play on words where "純尐姐 (单纯小妹)" refers to 'simple little sister' but with intentional misspelling. "迷人先生" is translated as 'charming mister'. Overall this implies someone who identifies themselves as having an endearing, perhaps simple-hearted yet alluring charm across genders.