short timeslip highschool romance drama 10ep - 15min each =2,5hours watchtime
plot:
Male lead was bullied guy at highschool and wanted commit suicide. Female lead saved him from doing it, but week after it she herself did suicide.

Ten years pass and male lead is doctor, but he still cant forget female lead.
Bam miracle happens and he timetravel to time before his attempt of suicide.
Will he be able change past?

Guess its about it. Story is quite casual, timetravel is usual thing too. Drama focus more on how male lead tries get into heart of female lead and change her pessimism into will to live.