Using the Hero Who Likes Me Too Much, I Intended To Live Longer in This Life, but Maybe I Failed Again

Count’s daughter Lisette is a “reincarnator” and this is her fourth life. In her past lives, she was always devoured by monsters on her 20th birthday.
In this life, Lisette wants to live longer, so she decides to live in a sanctuary (a countryside with only fields and forests) where monsters absolutely do not appear.
“I’ve been searching for you all this time. I’ve lived until today to meet Lisette-sama again.”
One day, Lisette reunites with Ralph, a nobleman’s son whom she saved in the past. It was Ralph who saved her when she was on the verge of death due to the weakening of the sanctuary’s protection.
“Please, use me.”
Surprisingly, he is the hero of this country who defeated the Demon King in the past. Lisette thought that if she stayed by Ralph’s side, she might be able to avoid death. So she accepts his proposal.
“Even if it costs me my life, I will definitely protect Lisette-sama.” “That woman, she might be a monster.” “…This might be the last chance.”
While bewildered by Ralph’s overwhelming affection, Lisette gets closer to the truth of her repeated deaths.
Will she be able to live longer in this life? This is a story of a heroine who doesn’t want to die and a hero whose love is heavy.