This film is based on Maiko Seo’s novel of the same name. Misa Fujisawa suffers from premenstrual syndrome; that’s what makes her lose it, against her nature, even when around her superiors. She changes her job and surroundings and five years later is working at Kurita Optics. Takatoshi Yamazoe sits next to her and is also much younger than the rest of the staff, becoming the object of her gentle manner and care –a strange, silent guy, plagued by panic attacks. Two people who get closer without falling in love, so close that they do each other good.