Kamen Rider Kiva: Companion of the Red Moon

"If the conquest is fake, then what about the heartbeat?"

An ordinary college student unexpectedly transmigrates into the world of Kamen Rider Kiva and is forced to bind himself to a Conquest System. His mission is to reach 100% favorability with Otoya Kurenai. But this Otoya is nothing like the character he remembers: cold and distant, with marks from strings wound around his fingertips. Behind his habit of practicing the violin at midnight lurks the restless stir of his Fangire bloodline.

Even more bizarrely, the protagonist can transform into Kamen Rider Tsukikage. His belt shares the same origin as Kiva's, yet its power flows with contaminated neural dust. As battles and everyday life intertwine, the System's missions gradually reveal a cruel truth: the price of a successful conquest may be Otoya's destruction... A fanfic that may differ from the original.