At first glance, many people tended to think that Ikuya and Hiyori were polar opposites. They had their similarities like any other couple but the main difference had to be that Ikuya was permanently cold. It didn't matter what the weather was like, it didn't matter how many layers he wore, it didn't matter if they were in the middle of a damn heatwave. Ikuya was always cold. Written for the HiyoIku Summer Weekends event on Tumblr for the prompt 17th July: Heatwave