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...".

A mysterious fire and a bullied girl committing suicide led her brother (Ryou Tezuka) to take matters into his own hands.Kidnapping three girls -- Yukawa Ayano, Inami Misuzu, and Tsubaki Rina -- he rapes and tortures them to extract information on why they had to bully his sister? Why did she have to die?Misuzu Inami is a model that does well, Ayano Yukawa works as an actress in public entertainment, and Tsubaki Rina seemed to be his younger sister's best friend.There is also the mystery of a journal hiding a dark past...

After the disappearance of her sister and finding out she had joined a suspicious enlightenment group seminar, Riko enlisted herself into the course to find her but the only way to reach the same course as her was to rank up and the only way to do so was to help others release... that being through sex.

The King of Hell had held Odin, the ruler of Norse gods, captured in the Land of the Dead with the help of Loki, the Trickster. The Valkyries failed to save him and ended up becoming sex slaves to the demons.As a trade to free himself, Odin had the river source to the World Tree sealed, which will destroy the whole world. But before that, Loki had Freya, Chief of Valkyries, captured to counter Odin's plot.In order to prevent the World Tree to fall, Loki have to find 2 keys which are protected by 2 invincible Valkyries - Sigurd & Suvia. And Loki turned his lustful attention on Suvia who was a Princess of Prishintia.