Shounen Maid Curo-kun  

Boy Housemaid Curo, Shounen Maid Kuro-kun, Koinu no Kuro-chan no Yuuutsu, Shounen Maid Kuuro-kun, 少年メイドクーロ君

Curo-kun is made to take over the debts of his father and forced to pay them off by being sold into servitude as a boy maid.