Ryosuke, an alpha, and Tsubasa, an omega, have been childhood friends to such an extent that everyone in their vicinity perceives them as a couple. Yet, even during Tsubasa's eagerly anticipated first heat, they are unable to establish a bond, resulting in Tsubasa feeling profoundly let down. Ryosuke refrains from engaging in sexual activities due to his concern about burdening Tsubasa, while Tsubasa grows increasingly frustrated as he desires to transition into a genuine couple. Although their affection for each other runs deep, their genuine emotions continue to elude one another. Then, unexpectedly, Tsubasa awakens as an Enigma…?!