Grade One student Hinata, who is serious and well-behaved, has a secret she can't tell anyone. After school, she secretly enjoys indulging in slightly naughty fantasies about her unrequited love, classmate Sato-kun, at his desk. However, the troublemaker Yuki and his friends witnessed Hinata's solitary play and filmed it. They used the video to blackmail Hinata into forced sexual acts, providing an outlet for their excessive sexual desires.
