曾田陵介

高校2年生の黒田希美は、移動教室の机の中に「好きだ」と書かれた手紙が入っているのを見つける。送り主は学校で一番の人気者・瀬戸山潤で、希美はイタズラかと戸惑いながらも返事を靴箱に入れる。その日から2人の秘密の交換日記が始まるが、実はその手紙は全て希美の親友宛てのものだったことが判明。しかし希美は本当のことを言い出せず、そのままやり取りを続けてしまう。交換日記を通して瀬戸山のことを知るうちに、次第にひかれていく希美だったが……。

Kisaragi Maaya, 16 years old. The first love confession of her life ended in complete rejection. She vows to "never confess to someone again" in the presence of the stoic but popular Chigira-kun, while on library duty together one day. Upon meeting again, and seeing her upset while reminiscing the past, he proposes they undertake a "pretend unrequited love play". As Maaya's heart begins to heal, her thoughts turn to them getting even closer... however she definitely can't fall in love with the out-of-reach Chigira-kun...? (Source: Mangaupdates)

Set in a solitary island school where only students who have caused problems are gathered, and communication from the world is cut off. Homura Itsuki comes to the school as a transfer student. At the school, there is a study group for the 19th-century French cruel drama "Grand Guignol", and Itsuki ends up joining that study group. In addition to the members of the study group, the teachers who manage them, the head chef, the mysterious new teacher, and other people who gather at the school are somewhat suspicious. And finally, a serial murder case like "Grand Guignol" occurs. On an isolated island with no way to escape, Itsuki and his friends are caught up in the vortex of fear of death and love and hate between men.