This yaoi manga has a bondage theme. its about this guy who need money for his ill brother. he then went to this place where bad people go....or something. he then found his friend who told him how to get the money. He had to enter a pet auction? his friend then said they had to prepare him properly and train him how to satisfy the master. and then smut. 😛 . in the end he became his friend exclusive pet and they would help his ill brother. Hope someone can help me? I've been dying to know the title and i've been searching for the past 3 months. 😢 🙁

I think it's Pet keiyaku by Zaria ^_^

Yes! Thats the one. your a life saver. 😃 😀