The swordsman thought he could only live in pain forever. By chance, he met the little monk. The two were originally from two different worlds, but a story made them make a promise for three lives. The swordsman waited for the little monk for three generations, and finally fulfilled his wish, leaving the monk alone to wait alone. The monk didn't know how many lifetimes he had waited for him, but unknowingly he had waited longer than the swordsman.
"I can't die. Only Buddha can kill me."
"I'll help you, I'll kill you."
...