Tsukishima, Tokyo, is known as the land of the Monja. One of Kanto's famous local food. Because of some circumstances, Yuzuki (21), the eldest child of the Umikawa family, is forced to become the second owner for the family's Monja restaurant business! Not only is he responsible with managing the business, he also has to come up with new ideas to keep the business going! However, his little sisters showed no sign of helping him! "Please my little sisters, help your brother!!"