"Why do you have an erection...? You're sneaky." In a world where all humans have suffered from ED due to a pandemic, Kazuki, a male student, is the only special person who has escaped ED. In order to keep the secret, he transferred to a harem school full of women!? A kind and friendly senior, a frustrated female teacher, the school's prince, the daughter of a wealthy family, and more. What will Kazuki, who can captivate any woman, choose? Note: Episode 1 received an advanced distribution on AnimeFesta on December 8th, 2023. The start date reflects the start of the regular series broadcasting.