Who is the true enemy? What will happen next in this twist of a story?

Kihyun gets pregnant from one of his used to be usual sexual encounters with Changkyun. When he finds out he's pregnant he is faced with two choices, to either tell Changkyun that he's pregnant or become a single father in high school.

The world we know is gone but for Jimin's, his life it has been the same until a Space Militia soldier brought in a man named Park Chanyeol. How will his life change because of one person or is it more than one person who will change his life forever?