Sexual Hunter Riot

The Kirionira are mysterious demons that invade the human world through people's dreams, threatening humanity's very existence. The only known defense against these creatures are special hunters who channel their sexual energy as a power source to combat the supernatural threat. Riku Yoichi, a young man from a distinguished family of hunters, possesses an exceptionally high level of this unique energy, making him a promising warrior against the dream invaders. After leaving his hometown following middle school to pursue his calling as a hunter, Yoichi eventually returns home, only to discover that the demon threat may be far from over. However, he now faces an unexpected challenge that threatens his ability to continue fighting: his once-potent source of power has mysteriously diminished. As the danger looms once more, Yoichi must find a way to reignite his abilities while navigating the complicated dynamics of his relationships with those around him, including his childhood friend Namba Midori and her classmates. (Source: MangaHelpers)