Rika is asked by her husband, who runs an atelier for students taking entrance exams in a certain region, to be a nude model. There she meets a young man named Yuki, who is aiming to enter an art college. It is the first time for either Rika to be a nude model, or for Yuki to see a nude woman, so they cannot hide their nervousness, but the two gradually grow closer. Touched by Rika's warmth, which cannot be felt by just looking or drawing, the affair between the married woman and the young man in the atelier gradually escalates...