The Beloved New Daughter-in-law Of The Wolf Mansion

The sole heir of the notoriously frail Wolf family, Arsen, has died. The culprits were his father and half-sibling.
They killed the heir with a lie, promising to use the family's healing abilities.
As a result, the family was destroyed, and I was also caught up in it and died.
But then…
"My lady, wake up!"
When I opened my eyes, I had returned to being seven years old, before my death!
"Please let me marry Arsen!"
I can't die unfairly again. I secretly requested a contract marriage with the Wolf family behind my father's back.