I Was Struck by Lightning

The story tells that when the male protagonist was seriously ill, his father wanted to treat him. After finding a doctor, the doctor told him that in order to save his son's life, he had to sacrifice his own life. There was no other way, so the father chose to save the child and give up his own life. Later, the male protagonist married a widow who was ten years older than him next door. There are many descendants, but on the night after his death, his wordless tombstone was struck by lightning, and he was resurrected because of the lightning strike. Then because of this rebirth, the dying old man gradually became younger with the passage of time, and finally became immortal~~~~~~