Hijiri Shiroya is a capable Manager in charge of a Team at a Game company. On the other hand, he lives as a Half-vampire in modern society. His recent trouble is that the blood of his junior, Ai Masuyama, emits a scent so attractive that his rationality flies away. Unable to lay a hand on his junior at the company, after much deliberation, Hijiri chose an unconventional solution——which was to change his gender and approach Ai!?