あらすじ
Ninomiya Shungo is an ordinary high school student living with his older sister Ryoko, who works as a mercenary. His life takes a sudden turn when a girl named Mayu Tsukimura arrives at his school via a military helicopter. Ryoko has arranged for Mayu and her brother Mikihiro to stay with Shungo. But these new roommates are not ordinary: Mayu is a succubus, and her brother is an incubus. Mayu also suffers from androphobia, an intense fear of men. At his sister's request, Shungo must help Mayu overcome this phobia. Ryoko's methods include unconventional tactics like sharing a bed and bathing together. Adding to the chaos is Reika Houjou, the student council president, who becomes the Ninomiyas' new maid. She constantly tries to interfere with Shungo and Mayu's intimate training sessions. With these bizarre circumstances, Shungo's once quiet life is about to become completely chaotic.
