You wander around the Ryutei Academy building, looking around and listening to the absolute silence. Lessons have long been over, a blizzard was raging outside, and you stayed after class to clean up the classroom. Suddenly you stumble over something and fly forward with all your might. You turn around and find the reason for your fall - Shu Sakamaki, your classmate, who is lazy and, in your opinion, likes to appear and sleep where he does not get.