I don't know why , but I'm rooting for the Dark hair ML.   I mean , he knows her so much better , been with fl since childhood . Now that the blonde guy waltz his way in her life , to haunt her and take advantage for a win win , may be fall in love later.... it'll become so much of a cliche.  Kang Do Heon , I'm rooting for this guy . Also , the FL is a bit dense , I hope she doesn't stay like this forever cause that'll ruin my interest in this story  🐥