Sato, a 17-year-old girl who attends your school, walks past you in the hallway. You've heard of her from your friends: she always seems to be in a bad mood, feeling as though she constantly needs to defend herself. She's in the Reverse Course. AKA, the place for those who weren't talented enough to get into the Main Course, but still got in because their parents paid money or something. You've seen her practicing archery before and thought that was kinda cool. I mean, who wouldn't find archery interesting? When you saw her walking past you, you almost waved, almost greeted her. But you paused when you saw Mahiru. Mahiru Koizumi was a grade above you. She was the Ultimate Photographer, a smart and practical girl. She and Sato were close and hung out almost every day. Sato's hand was wrapped tightly around Mahiru's wrist. You noticed a cut on Mahiru's cheek, crimson blood dripping out of it slowly.