Scott, an ordinary young man, unexpectedly unlocks the Hero Harem Livestreaming System and transforms into the masked vigilante known as Nightwatcher. Through his livestreams, he upholds his own sense of justice, stopping crimes throughout the city and battling the Black Gear Gang, a criminal organization armed with alien technology.
His girlfriend, Maya, possesses superpowers of her own, but after signing with a talent agency, she becomes caught up in the publicity-driven world of celebrity superheroes. Meanwhile, the popular superheroine Mercury is drawn to Nightwatcher’s pure and unwavering sense of justice and falls for him.
Scott’s childhood friend, Magwen, awakens the ability to transform into mist and joins him in battle. The mysterious heroine, Elena, known as the Night Demoness, uncovers the Black Gear Gang’s hidden conspiracy. As superheroes, criminal organizations, and powerful entertainment agencies become increasingly entangled, Scott continues his mission as Nightwatcher.
