Aww.. Byul's storyyy.. heyyy when did Dojun and Heesoo had a girl??

In the side story. They adopted her

reread the main story, theres some point were dojun and heesoo had a fight bcoz heesoo is worried taht he can't produce a child for dojun, they made up and ended up adopting a baby girl

I remember them havig a fight.. i reread the side stories