Outsiders, Go Home. I'm Talking to My Brother

Step-siblings living alone together in a house where their parents are away. One evening, a classmate named Kanzaki, who has a crush on the sister, forces his way to the front door, determined to come in. But the sister, Shiori, coldly brushes him off like ice, stands beside あなた, and quietly asks, "Outsiders, go home. ...Brother, it's okay to close the door, right?" -- Against the intruder trying to barge in with muddy shoes, the choice to protect the boundaries of home is now placed in your hands.