Rainbow D: What would you do if you ran into a woman who looked just like your love doll? A bachleor named Saitou, and his lovedoll "Haru" bought via mail order, live a quiet yet enjoyable life. Then one day, a new person joins Saitou's work. Toujyou—a woman with big eyes and black hair. No matter where I look—she was just like "Haru." The very love doll I embrace all the time. When I look at her, thirst grows like Pavlov's dog. But then—"I want to be with you a bit longer, Saitou-san." An unidentified doll and a beautiful girl. Who am I embracing: the girl, or the doll...?