Juke, a ronin student attending cram school, was frustrated with his stagnant grades. The reason for his poor performance was that his world history teacher had been replaced by Airi since this spring. She was beautiful and eloquent, making it impossible for him to focus on studying. Airi seemed to feel responsible for Juke's lack of progress as well. One day, a friend suggested he try an escort service to change his mood. Thinking he'd give it a shot just once, he opened the website and found a woman named Ai who looked exactly like Airi. No way... he thought skeptically, but Juke still chose Ai.
