Is there a gender-specific way of using 先輩 or 後輩?


My motivation behind this question is that I want to translate the Chinese
word "学妹" into Japanese. 学妹, as you probably have guessed already, refers to a
female 後輩. A male 先輩 is 学长，female 先輩 is 学姐，male 後輩 is 学弟. However, it seems
impossible to be gender specific when using 先輩 or 後輩, since these word
encompass both genders. So what is the appropriate, natural word for a female
後輩?

Edit: Sometimes, 学妹 can be used flirtatiously. That is, sometimes, you can be
more flirtatious by calling the girl 学妹 instead of using her name or
something. I cannot find the word that has this usage in Japanese, so that's a
better explanation of my motivation.




I'm not aware of any single word for that concept. Normally you have to say
後輩の男の子, 先輩の女性, etc. If you're specifically interested in that "flirtatious"
connotation, I've seen 妹/姉 used in a similar way [at least in
fiction](https://en.wikipedia.org/wiki/Maria-sama_ga_Miteru), which should be
rare in real life.

