erika lives as the wife of a young president of a small construction company. yuugo, who had a crush on erika during their student days, was an abnormal person who rarely attended school and still harbored obsessive feelings for erika. years later, after both had become adults, yuugo found himself working at the same company as erika. upon this unexpected encounter, yuugo's feelings for erika overflowed, and he became jealous of her elegant life, leading him to act strangely.