Hiroshi Nonomura is Ami Nonomura's step-brother, attending junior high school with her in Japan. Their relationship begins with a sexual encounter during Ami's mother's business trip absence. Discovery of this affair by Ami's mother leads to Hiroshi being sent abroad to study in London. This separation profoundly impacts Ami, fueling her emotional distress and subsequent severe depression. Their incestuous relationship recurs as a central narrative thread throughout the Cream Lemon series. Hiroshi appears in the film "Tabidachi: Ami Shuushou," concluding Ami's storyline in the franchise. He has black hair and blue eyes.