can i get a short summary of what the story's about

Fl and ml both have complex family issues. While she is the top student in her whole grade, he is a no-good slacker. They had nothing to do with each other but one day while Fl was studying at her usual spot; an "abandoned" house. She realized ml was sleeping just above her inhabiting the same space all this time and they naturally develop a domestic type of relationship while navigating through their own personal family problems. To protect their special relationship, they both make an effort to act as strangers at school.