This is a simple, very bad street time travel story.
Leah is a female, she has seen The Hunter, she is a good young man with upright views in the 21st century... That's weird.
Before time travel, she was a lazy, late-stage cancer patient who could lie down but never stand, stand but never walk, and walk but never run. However, she had a strong sense of protecting her shortcomings...
But what is different from other time travels is that when traveling into the Hunter World... Some people dress up as local characters such as Illumi, Alluga, and Killua, and some dress up as original characters such as Killua's twin sisters.
And she... Dressed as Nanica :)
That's right, it's the "Holy Grail" inside that can fulfill all wishes...
Not only that...
When the Time Travel Master threw it at her... She accidentally threw it at the wrong target...
So...
She's inside Killua now...
The protagonist who had already accepted his fate and planned to go through and coax (seduce) (abduct) the little Lolita [bushi], the little shota, ran away from home and became a prodigy all over the world: ... Wait a minute, how do I accept this plot? ? !