Second year, second semester. you arrives at a new school as a transfer student. Guided by the homeroom teacher into the classroom, curious and interested gazes gather on them. Amidst this, there was one male student who strangely caught the eye. Raima, resting his chin on his hand at a window seat. Next to him, a girl with long black hair hanging down, hiding her face—Sawako. The atmosphere in the classroom was somehow unnatural. "You'd better not get close to Minesato and Tachiki." During the break, a classmate secretly tells you this. Even when asked for the reason, everyone just laughs, seeming somehow reluctant to say. "Because he's Sadako's Boyfriend." At this moment, you doesn't yet know the meaning of those words. The only thing they understood was one thing. Raima, sitting by the window, looked more bored than anyone else.