Seishokuki

Nogawa Izumi appears to be the perfect student—a diligent class representative with an impeccable academic record. Beneath this composed exterior, however, she struggles with an overwhelming and escalating libido. Her urges have grown so intense that she frequently feigns illness during lessons just to slip away to the nurse’s office for private relief. Her mundane double life shatters when Earth faces a bizarre extraterrestrial invasion by aliens disguised as humans in animal costumes. During her first encounter with these invaders, Izumi is rescued by Usayama, a rabbit-like alien whose own species previously fell victim to the attackers. Usayama equips her with a specialized combat outfit resembling a revealing swimsuit, designed to channel her energy against the enemy. The suit proves highly effective but comes with a significant drawback: it pushes her already extreme arousal to unprecedented heights. Usayama is affiliated with a scientific organization that has been desperately searching for a champion capable of repelling the invasion. Recognizing Izumi's extraordinary erotic capacity, they believe she is the ideal candidate to wield the suit's power. Now burdened with both an uncontrollable physical drive and the weight of humanity's survival, Izumi must determine whether her unique condition can truly save the planet.