Natsuo, a young man who remains a virgin even before the age of 25 due to his natural weakness and reaction to his sexually uninhibited mother, Saeko. He continues to fall in love with his childhood friend Nana (Ren Fukusaki), but she is the type of woman who has a lot of sex experience like Saeko, so Natsuo hesitates. Natsuo's biological father, Narahashi, who has been watching over Natsuo from the shadows, prepares something to teach him about love. It was an android love doll Angela (Saki Okuda) that he developed. Angela uses her superhuman computing power and SEX skills to bring Natsuo and Nana closer together, but at the same time, a faint "something" begins to emerge within her...