Read manhwa How to Save a Time-Limited Young Master / I possessed the daughter of a duke's vassal.Who is a companion of the sick young master, whose lifespan is reduced every time he uses mana.Young duke has more mana than any other duke in the past, but people say he will die before he becomes an adult."Young master. This is my daughter Herace.""Herace, why don't you greet the master?"Master Zenon, who has been neglected for a long time and has a bad personality.A father who tells me to become close with such a master.Herace learned that he doesn't have any friends, so she decided to hang out with him from time to time.This world is a world in the game, and Zenon is destined to die soon after being used as a magical tool'. Furthermore, "Sometimes I forget that Zenon's days are numbered. You must be lonely, but what can I do? Everyone is like that."Zenon's uncle, who is a villain, interferes in his affairs every time!I can't help it. For her peaceful life, Herace decides to protect the young master."Don't worry about that at all. I will somehow find a way.""And if the young master dies, I'll follow him soon."But somehow, the master seems to be more interested in other things than his own life."What was that earlier?""What?""You said you're going to die after me."Is this what's important now?