My younger sister came to Tokyo from our hometown to see me. "How have you been, big brother? I'm so happy to see you after so long." Reuniting with Hitomi, who has grown into a beautiful girl who looks great in her school uniform, reminds me of the forbidden relationship we had when we still lived as a family. As soon as we get to my room, brother and sister become like man and woman, and we repeatedly engage in passionate, loving, intense, and lewd sexual acts. "Please, big brother, come inside me!"