A brother who desperately wants to be with his sister Miiro, always stalking or confessing his love for her. A sister who hates him for it... One day, after breaking up with her boyfriend, Miiro says 'If it's only for a month...' and accepts her brother's confession without realizing it will start an irreversible taboo relationship. From that day forward, they begin a life of incest hidden from their parents. Gradually, Miiro becomes captivated by her brother and can't live without him. Sometime later, the brother who had left home suddenly returns with his fiancée... At that moment, Miiro...
