Shounen Harem

From Sugar-Oasis:
Suzu, the result of a love affair that happened a long time ago between the master of a rich family and her mother, who worked there as a maid, is to receive a large inheritance from the Hakuhouen family after her father's death. However, this family is nothing but greedy people who will go to any extent to get a hold of this fortune. To protect herself, she must set up a plan, which is to announce she'll hand over all the rights over the money she has to her husband, which she will choose within the family...