When Taehyung thinks that all the things he had done is only to keep the smile in his angel face, without ever consider about the effect of his actions to himself, others, and most importantly to the one he wanted to protect the most.

When Jungkook thinks that Taehyung has violated the most important values in their relationship, even if it simply a matter that may be considered small by others.

What is the beginning of all of this and;

how the pair managed to resolve the problems that come and hit them?