Kazuho Anamori, a high school girl, was unable to fit in with her class because she was reluctant to withdraw. One day, by chance, she met Miko Karakida, who was born with heart disease, and they became closer. However, six months later, th...
本作品将2017年首演的同名舞台电影化。描写了失去挚友的畏缩不前的女高中生·穴森一穗收到一封信,前往神秘的转校生等待的夜晚的校舍的样子。