Changing to Stay {Ao No Exorcist fanfiction}

Two rare demons living in Ghenna are summoned by Satan himself. They are extremely capable, and powerful demons, believe it or not. They're sent to go bring Satan's half human sons Okumura Rin and Okumura Yukio to Ghenna. Off to spy on the twins for a few days, the two make their way to Assaiah and are enrolled by Samael (Mephisto Pheles). Suddenly, their plans are screwed. One spent a bit too much time with the twins, is she falling for one? And the other? Already old friends with Amaimon? They don't want to leave Assiah. They don't want to kidnap the twins. How will Mitsuko and Shinju handle it all? Will they cave in, or change their ways to stay? Written by @DeniseContreras and @Monynoky / @OopsyWoopsy