Succubus Family – The Semen-Draining Contract and the Boy Who Was Taken In

One day, my parents suddenly disappeared, leaving me all alone. The one who welcomed me into her home was Yuri, the neighbor I had long admired. However, this house held a certain secret. The family living here were actually succubi who drained semen from humans! According to the rules of the succubus world, in order to truly become part of their family, I had to make a special “contract.” But every one of its conditions was filled with lewd demands…!?