When Fuyuki accidentally stumbles upon Yomina's secret in the locker room—her wings—he is taken aback by her half-succubus nature. Despite the initial shock, Fuyuki promises to keep her supernatural side hidden. This unexpected encounter leads to a unique bond between them as they tackle the complexities of high school life together. Yomina, with a hidden desire for companionship, finds in Fuyuki a companion to navigate the ups and downs of teenage friendships and humorous escapades. Amidst the ordinary school days, the duo faces the peculiar challenges stemming from Yomina's half-demon lineage, adding a twist to their shared adventures.