Gyeoul Jina Beojkkoch

Once young friends, Hae-Bom and Tae-Seong have grown distant after tragedy brought them under one roof as a family almost 10 years ago. Things get more complicated in their last year of high school as now they're... classmates too?!

Note: The chapter count includes 7 extra chapters and an epilogue.
(Source: Tappytoon, edited)