​When shrine maiden Nonoa mysteriously disappears, her childhood friend Yamato and an angel named Sera are sent into a flurry of panic. What is even stranger is that Filika, a devil, vanishes around the same time. Yamato discovers his hidden potential after donning an angel’s halo and Nonoa’s panties, causing his manhood to grow in size. Utilizing his newfound power, he spins his penis to achieve propelled flight, embarking on a thrilling pursuit alongside Sera to catch the naturally flight-capable Filika. Unbeknownst to them, Filika abducts Monika and brings her to a secret base, where an unsettling ritual involving Monika’s sex slaves ensues. As the ritual progresses, Monika’s belly swells from the copious amount of semen she receives. Meanwhile, Nonoa remains oblivious, taking a shower while Filika prepares to use her in the completion of the ritual.​