Kaito, an otaku and back-end programmer, wakes up in the world of his favorite anime, What is Love, after falling asleep while watching it. In this magical world, he discovers he possesses powerful magic with two elements, black and white. Kaito finds himself caught in the love story between Rena, a pure-hearted commoner girl, and Prince Alex, whose relationship with Rena is threatened by Livia, a noblewoman jealous of their bond.

With his newfound powers, Kaito vows to protect Rena from Livia’s evil schemes. But the deeper he gets involved, the more complicated his feelings become. On one hand, he struggles with jealousy towards Prince Alex, while on the other, he faces dangerous conspiracies that threaten Rena’s life. Will Kaito be able to change their fate and return to his original world?