Sanoku-en Koukousei

A high school student named Mitsuki takes on the responsibility of caring for his ill sister. Lacking parental support, financial resources, or any special skills, he is forced to take on dangerous work for an illegal operation. He is exploited by those more powerful and eventually robbed. Overwhelmed by the harshness of his situation, he is approached by a woman who identifies herself as a detective. She offers him a chance to change his circumstances with her assistance.