Jinyoung has been together with Hyunsik, ...Mark's hyung. Jinyoung has always seen Mark as a young boy. For him, Mark is only a young boy (although they are of the same grade level).

But the truth is Mark takes more care of him, than his brother does. Mark spends more time with him, than his brother does. Mark listens to him more, than his brother does. Mark understands him more, than his brother does. And now Mark is saying, he can treat Jinyoung better, than his brother does.