firstly 9/10 is mine very subjective rating for mine personal likes. Objectively would grade it 8.5/10 like cha cha town.
32ep - 30min per EP = 16hours watchtime as usual kdramas
plot- story where 17year old girl gets into accident and falls into coma for 13 years.
She is suddenly 30 in hospital. Nobody comes visit her its why she runs from hospital and tries to find her old house old life.

Its cohabitation romance drama with tightly knotted fates between main protagonists.
Female lead played quite well 30year old with mind of teen and gradual acclimation to new world of adults.
Genre - cohab,romance,mystery,teens 9/10