(Teacher-student romance. A bond spanning three lifetimes, no NTR, with a little angst.)
In this world, there are two kinds of people. One kind cultivates immortality, with limitless prospects and the attention of countless people. The other kind is mortal, with a lifespan of no more than a hundred years. Even those with heaven-defying talent are but a fleeting bloom.
Time is like trying to draw water with a bamboo basket: in the end, it all comes to nothing.