Tengoku de Akuma ga Boku wo Miwaku Suru

Kaoru Shabana seeks to shed his sheltered past and become a strong, independent adult. To do so, he joins an elite academy located on a secluded island. There, he encounters Kanra, a strikingly tall woman who discloses that the academy is inhabited by succubi. Kaoru soon discovers that the institution he hoped would help him grow is instead a trap. As the succubi take control, he risks being drained of his vitality. The story follows his struggle to break free from the academy’s grasp before it's too late.