Misaki (Kana Kurashina) found that the center part of her eye vision was blurred, so she went to the university hospital and underwent a careful examination by Dr. Asakura (Jun Kaname), an authority on ophthalmology, and was diagnosed with pyramidal dystrophy.This is a difficult disease in which not only the visual acuity will gradually decline, but also the color vision function may also deteriorate.

Makigami (Takifuji Kenichi) was worried that Misaki was in a daze and kept calling. Misaki was unwilling to answer the phone, so Makigami had to go to her home to visit.However, a few days later, Misaki received a heartless notification.