As a self-proclaimed fudanshi, Kotone was buying BL manga at a stand when a truck careened out of control and killed him while he was still surrounded by his beloved books. To his bewilderment, he woke up in a majestic palace that looked ancient and Asian. Nagi, a half-serpent man, informed him that he was now Kotone's Miko and that they must have intercourse for Nagi to transform into a Dragon and ascend to a higher realm. Knowing he would inevitably end up as the submissive partner, Kotone resolves to use his vast knowledge of BL to resist falling in love and avoid relegation to the bottom in this strange new world.