Tsujimura Mizuki

Kakeru Nishizawa and Mami Sakaniwa met through a dating app, and they soon decide to get married. After their engagement, Mami suddenly disappears. In trying to find her, Kakeru must confront a side of Mami's past that he might not have wanted to know.

Having lost her sense of belonging at school, seventh-grader Kokoro Anzai has been staying at home as a shut-in when, out of nowhere, the mirror in her room begins to shine. Walking through her shining mirror, what awaits her on the other side is a mysterious castle. There, Kokoro and six other middle schoolers are told by their guide, Lady Wolf, to find the key to the “forbidden room that can grant any wish.” Number one in bookstores for sentimental novels, now in full comic!

On a snowy school day like any other, classmates and childhood friends Hiroshi and Mizuki arrive at school to find the campus eerily empty. Before long, they find themselves trapped inside with six other friends, and even stranger, all the clocks have stopped at a very specific moment–the exact time when a former classmate jumped off the school roof to their death three months earlier. It turns out that this departed friend is their way out of their current predicament and may even be among their group…but no one can remember who it was that took their life on that sad day. The students must face themselves and their past memories to piece together the identity of this suicide victim or risk a similar fate–with their lives lost and forgotten inside these frigid school walls.