Tsukina a 17 year old girl, that had an father that stole money from her as a child to use on gambling, and as well as her older brother for being cold towards her. She developed an huge annoyance for men, so much that she begged her mother to let her go into an girls school. Now her father had sold their house and which forces Tsukina and her family to end up living with her mom's rich friend, and her FOUR SONS... The two mothers have some plans in store for Tsukina and the four sons! Let the Marriage Operation Before Romance commence!