Midou Saki is an eliminating type of yandere with a sadistic streak. Her trigger was the rejection of her confession during primary school due to Kazumi already having a crush on someone else.
SpoilerIn response to the rejection, Midou murders Kazumi's crush in order to gain his love. However, she was sent to a child independent support facility which she would not be allowed to leave for 3 years.SpoilerWhen she returned from the facility, her family along with herself were harassed constantly for the incident that happened 3 years prior, and so they kept moving houses, which didn't work. Eventually, Midou was offered to work and live at a Kindergarten, which she accepted and her mother saw her off the house.SpoilerMidou soon returned to the house and found her mother had committed suicide. The shock from this event caused Midou to lose her memory.SpoilerAfter regaining her memories, she changed her name to Miou Misaki and started working at the Kindergarten.SpoilerAfter regaining her memories upon seeing Kazumi again, she begins torturing those close to Kazumi, and then Kazumi himself.SpoilerKazumi escapes and devises a plan to capture Midou with the intent to kill herSpoilerHis plan works, however, his friends convince him that there's no point in killing her. Midou, realizing she won't be able to escape, decides that she wants to die by his hand to never get out of his headSpoilerThe police are called and Midou is imprisoned. She sends a letter to Kazumi and stabs herself in the neck with the pen she used, killing her.
