This Is a Boring Novel

[Single female protagonist + cultivating immortality + no system + no rebirth + those who mind, please enter with caution] (Who said that the protagonists of novels about cultivating immortals must have many girls? I don't. I prefer to write about a single female protagonist.) This is a world of immortality, but the highlight is the story of the male protagonist finally choosing a female protagonist after some decisions. Among the girls who live and die with him, one is a genius and the other is a killer. My master looks gentle and considerate on the surface, but in fact he is extremely possessive. Among the three female teammates of the adventure team, one is the eldest daughter of a certain family, one is a genius in the magic forest, and the other is just like the girl next door. If it were you, how would you choose?