Y/N was raised by Maruo Nakano after his parents death, he later moved to his grandparents house in America, but after 4 years he returned to finish some "business" he had planned long after his parents death and also meet Maruo daughters for the first time. Y/N's also a vigilante that protect the city at night while also try to balance his normal life in day time, how will the story of our protagonist goes, and what kind of relationship will he developed with the 5 identical sisters? let's find out. Quintessential quintuplets not own by me, and there are some other anime characters will appear but with different names and personalities, so keep in mind.