During his school debut, Taiga Makihara's life hangs by a thread as he plunges into a hazardous pit, only to be rescued by the revered student council head, Konoe R. Chika. Enamored in that moment, Taiga sets his heart on winning her affections by his side. However, his ideal image of Chika shatters when he uncovers a shocking truth – she is a facade crafted by five unique quintuplet sisters, each possessing distinct traits and skills. Does this mean Taiga's beloved Chika is merely an illusion? Determined to pursue his feelings, Taiga plays along, feigning ignorance of the sisters' ruse and endeavors to win all five as his girlfriends.