Kageyama is a high school model who hates people and is most afraid of getting a sunburn. One day, his older sister came home drunk and was taken care of by a girl named Haruhi Hidaka, a mood-maker in the same class. I thought I was in a different dimension from her and would never get involved with her. But after that day, Hidaka and Kageyama quickly grow closer... A sweet and sour coming-of-age love story of two opposites begins.