If Ms. Suzuki were my teacher... I wish she was my mom instead. She doesn't seem like the type to hit us or anything like that. As they laugh together, Miyabi looks at Lara, her piano instructor's daughter, fondly. ...After going through a divorce due to her husband's domestic violence, she finally found some peaceful days. However, neither mother nor daughter knew about the immense madness that Mr. Suzuki was hiding.

「先生がお父さんだったらいいのになぁ。先生は前のお父さんみたいに暴力ふるったりしなそうだし」ピアノ講師の杉浦と楽しそうに談笑する愛娘のララを見つめる美菜。…夫のDVが原因で離婚、愛娘にもずいぶん辛い思いをさせてしまった。離婚してようやく訪れた穏やかな日々。しかし母娘はまだ、杉浦が隠し持つ大いなる狂気に気づいてはいなかった。