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 herwith 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 introduceUrara to the lab master, Majima.Then in a luxurious and grossly decorated room, Majima can't stop licking his lipsogling the sexy Urara. He tells her she being chosen by god, and that she mustenter the seminar to obtain answers.But, the seminar is a seminar in name only, nothing but free sex every day involvingthe poor Urara.One day Urara discovers the surprising reality from Riko's mouth. The real name ofher fiancee is Kaji, a lecturer in the Believe Lab.Furthermore, her senpai Asuka is also a participant in the lab. With a lascivioussmile, Riko makes Urara jealous telling about Kaji having sex with Asuka.Urara walks into a playing room and sees Kaji and Asuka having sex. Urara screamsin surprise and despair, in front of them she stutters back into a wall.With a misterious smile she finally breaks and murmurs " Be... lie... ve...".