Yurina Kumai

One night, Chiemi Honda and childhood friend Nobuaki Kanazawa receive an email. The sender is the King and the subject of the email is "King Game." The email states that if the recipient does not complete the king's order within 24 hours then they will be punished. Since that first email all of Chiemi's classmates receive an email from the King. At first, students think it's a joke, but perform the orders anyways. Gradually, the orders become worse. Finally, 2 classmates who do not follow the orders are punished. Then classmates start to disappear in sequence. Maria Iwamura stares at one classmate coldly. With Maria Iwamura, Chiema Honda gets closer to uncovering the identity of the King, but tragedy is about to come to Chiemi..

小学校時代の恩師に深く影響を受けて教員を志した三輪元は、念願の教員試験に受かり山口県の小学校に赴任する。三輪が担任になったクラスには、複雑な家庭環境から周囲に心を閉ざした転入生、比加里がいたが、ふとしたことからクラスでほたるを飼育することになり、その飼育を通して比加里も心を開く。だが、生徒たちがほたるを放流する予定の川が護岸工事されることが発表され、ほたるの放流が危うくなる。