Carina Taibon, a capable and beautiful monster hunter in the kingdom of Tartrun, is tasked with tracking down and killing a penetrim - a sex beast. However, when she attempts to set a trap for the monster, she underestimates his abilities and is defeated by him. The monster attacks them with six tentacles and a terrifyingly large phallus. Her only chance of survival is a resistance-boosting potion that is no longer available. Her worst nightmare appears to be coming true, but she discovers deviations from his species in the being, causing her to see and feel it in a different light. She wants to unravel the mystery behind this unusual penetration, but first she has to survive his sexual submission in one piece... Please do not read if you are under the age of 18. All characters depicted in this work of fiction are 18 years of age or older.