Xu Anyi lived a smooth life and lived happily to the age of sixty-one. The only regret she had when she died was her sister who died young - Xu Youran.
(The heroine——Xu Anyi
The male protagonist appears a little late, mainly talking about what happened between the two sisters.
Also, in the imaginary era, it may be unreasonable, so be cautious)
Intention: Release all regrets