Rin x Sen Ran Sem Cross Mix

A cross over between the two hentai RIN×SEN and RAN→SEM.
The story starts with Urara still being abused in the Kurodou institute. One day she is told by the headmaster that her fiancee, the one that set her with a great debt and only her body to pay for it, has been seen in the Believe lab.
Luckyly, two lecturers at the lab, the Ichinose sisters Riko and Anna introduce Urara to the lab master, Majima. Then in a luxurious and grossly decorated room, Majima can’t stop licking his lips ogling the s