Entergram Dawning Subaru, and The Owl Lurking in the Twilight Switch

The story takes place during winter at Seibunka Gakuen, a private school in Asahikawa, Hokkaido. The protagonist, Subaru Sakaki, and his childhood friend, Honoka Takamura, are excited for their final school Christmas party.

However, their joyful days are shattered by devastating news: their best friend, Miyabi Yashiro, and their homeroom teacher, Asuka Yuri, have been murdered. To make matters worse, another close friend, Kazuha Shinozaki,has been arrested as the suspect.

Certain of friend's innocence, Subaru and Honoka launch their own investigation to uncover the truth behind the incident. But unbeknownst to them, someone with deep ties to their own hidden "secret" is pulling the strings behind the scenes.