Initially not wanting Hae-Bom to live with them, he changed his views to sharing what he had with Hae-Bom. Tae-Seong ends up joining Hae-Bom in class.

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)

Tae-Seong Jo