It is said that witches are invulnerable to fire and water, but love can kill them. Once they love humans, their lifespan will end. The deeper the love, the shorter their life span.
++++++++ A tradition arose. When witches became bored and no longer wanted to live, they would pick up a child to raise.
They even have a textbook manual to teach you how to be a good parent, make your adopted son trust you, admire you, and raise him to be what you like, and then the witch will love him and die.
++++++++ Manual title "Kill the Witch"
Intention: Witch