Rei Yokoyamada is a high school student who dreams of becoming a major film director, and his father works for a film production company. While searching for actors for a short film he plans to make with his friends, he finds gossip notices announcing that the adult film star Papico lives nearby. He tears them down to protect her and then runs into Papico herself. Their encounter pulls them both into a bizarre supernatural event, as Papico gains the power to grow to an enormous size. Is alien technology behind it, time travel, or the end of the world? Rei's ordinary school life turns strange, and a giant woman is only the start of the trouble ahead in this sci-fi romance drama with ecchi elements.