Description:

It has been 7 years since Sora Ono was sent to another world, where she was made to be a slave. Because she went to the wrong section at the slave office, her “slave” status was accidentally revoked, and Sora walks away a free woman. Then one day, she purchases a slave... Source: MU

Alternative Titles:

元奴隷ですが、鬼の奴隷を買ってみたら精力が強すぎるので捨てたい..., I'm a Former Slave, but I Tried to Buy an Oni Slave Who I Later Found to Have Too Much Energy So I Want to Throw Him Away..., Moto Dorei Desu ga, Oni no Dorei wo Katte Mitara Seiryoku ga Tsuyosugiru node Sutetai...