A bittersweet story about humans mysteriously waking up in another world. Yin Todd and YƔngduan Ai are two childhood friends who happened to wake up together in another world, Misuteria. Yin and Yang shared a lot of unconditional love together for years. However, their sweet friendship soon turned to hatred due to many painful and unforgettable moments. With conflict trying to get in their way often, how will things go for Yin, Yang, and their friends, through what means can they repair what they lost?