The Lament of an Immortal, Worlds Collide

Synopsis: Thousands of years have passed in the future and many things have happened since she had the visit of that immortal being (Rimuru) who got involved in her life and changed it forever, now Azusa, the highland witch cries when visiting the tombs of his former daughters Falfa and Shalsha and remember the last time he held them in his arms. In addition to being tormented by the recurring memory of her old friends who died at the same time that she curses being an immortal.
In parallel we have Touya, who visited the family crypt where the remains of his former wives reside. The pain of losing Leen, the last of his wives left alive, tore at his heart. After this his sister Karen talks to him to encourage him by telling him
"The love you feel for them will never change Touya... you can live with the pain of losing them... but they wouldn't have liked that... stand up and move on, I know you will find someone like... ."
he just wipes the tears from his face and answers - "I'm an immortal Karen... find someone like who? Like me?... I doubt it"
She just smiles and says and says... "I wouldn't say that"