expression, noun
unattainable prize; something out of reach; flower on a high peak
Idiomatic expression for something highly desirable but impossible to obtain, often used for a romantic interest perceived as too good for oneself. Literally 'flower on a high peak'.
彼女は僕にとって高嶺の花だ。
She is out of my league.
あの大
That university is an unattainable prize; it's hard to get in.