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Without a stable job or home, Joo May lives recklessly, drifting from one lover's house to another. One day, May passes out, almost beaten to death by an ex-boyfriend he bumped into. When he wakes, he finds himself chained up in the house of Shin Jooin, the clean-cut man who apparently rescued him. But there's something off about Jooin, who treats May almost like a pet... Who is Jooin really, and what is he hiding?

"What a cute face..." he said stripping off his mask and kissing himKyota, who hides his face with a mask due to his past trauma, closed off his heart and exists inconspicuously in class. However, he is persistently bothered by Arino, who he wants nothing to do with and reveals his face. Kyota is being teased as he turns red and resists. His crying face is all the more attractive to Arino...

"My sweet sacrifice... I shall relish every morsel of you." With no family left and burdened with the ability to perceive animosity in others, Yukio decides to flee the village. When he does, they capture him and decide to give him to the Demon God as a sacrifice. Exhausted from the villagers hate, a burning desire to annihilate the village that casted him out began to grow. Yukio strikes a bargain with the Demon God: his own flesh in exchange for their destruction. But as he offers himself up to be consumed, Yukio finds himself engulfed in sensations of warmth and affection he never thought possible. As the Demon God's touch and words envelop him, Yukio's world spins into a dizzying blur of ecstasy and longing... Something he had never experienced before...!!

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The curious secrets of the human body that the world has never recorded. From the head to ‘that place,’ they are revealed in [Seongbidan] Five Organs, Six Shafts.