Beautiful girl JK Ichika, teacher Shinji, and younger sister Serina are childhood friends. However, the relationship is estranged due to a certain incident. Before I knew it, Serina and her faction had been openly bullying Ichika for a long time... that's what you wanted, wasn't it? I will never forgive her... When Ichika apologizes and offers to reconcile with her, Serina flatly refuses . Ichika wasn't discouraged by the gradually escalating act of staring at her, and was just looking for a story to do something about... What is it? Staring at the video sent from the voyeur camera installed near Serina's room...