St hirokoshi high school,one of the elite known for the well academic acheivement and the oldest school in japan. An elite buisness man wanted to pass down his wealth to his ten children, ryosuke,chinen, ryutaro,yuto,keito,inoo,daiki,yabu,takaki,hikaru. They will need to leave to live together until they graduate from high school and if any of them leave the mansion, they will lose the inheritence and be cut off of the father son relationship.