Why r people saying "I hope it stays the way it is".... girl the tags are yaoi and romance. There's most likely gonna be a time skip before anything happens as well.
And there's literally other manhwa's with a similar trope, it's nothing new, so idk why some of yall whining lmao.
Also sejin is literally a teen, he's never seen seju with familial goggles. He already was blushing around him and already seems to be developing feelings.