3 Nen A Kumi: Ima kara Mina-san wa, Hitojichi Desu

3年A組 ―今から皆さんは、人質です―, Class 3A - All of You Are Hostages From Now On , Sannen A-gumi - imakara minasan wa, hitojichi desu - , Mr. Hiiragi's Homeroom

With graduation 10 days away, homeroom teacher Hiiragi gathered all 29 students of class 3-A and proclaims them his hostages. His last lesson regards the death of a student that passed away a few months before. Nobody will be able to graduate until the truth is known.