She died in a fire at the age of 28 and was reborn as a 22-year-old, with the medical memory of a 30-year-old and a dead heart; he was a forensic doctor, and after staying beside her body for 7 days, he used her notes to experiment with rebirth and returned to the past 3 months before she did - he calculated that he would come to her when her heart beats for the seventh time.
"I have dissected 327 cadavers, and every heart tells me that love is not a feeling, but a physiological reaction. But after I met you, my heart learned to lie - it said I didn't love you, but every time you came close, its beating frequency was exactly the same as the most perfect heart I saw on the autopsy table."
The seventh heartbeat is not death.
This is the seventh time of questioning and the beginning of the answer.
