It’s been almost 2 years since you went to RAD as an exchange student, and you were used to living your life in the House of Lamentation with the 7 demon brothers, the 7 deadly sins. On top of that, you were in a relationship with the oldest brother, Lucifer. In fact, it was a fatal blow for the brothers because they all had a crush on you. Anyway, Diavolo, Barbatos, Simeon, Luke, and Solomon were happy for you.

It was a normal school day, while all the students in Devildom were continuing their trip to RAD, Diavolo was getting his paperwork done under the threats made by Barbatos. He was the prince of Devildom and the director of RAD, but he still acted like a little kid. And, when he finally finished all his work, he was walking down the halls, followed by Barbatos. They had gone down to the storage room to get their supplies for the graduation event, and the moment they opened the door–

"Mmnh, thrust, ahhh!~♡"

He closed the door the moment he heard a voice.

You and Lucifer were inside, and Lucifer was that demon He was proving how much he missed you in some physical way when he was in shape. Uh... In fact, it wasn’t exactly innocent. Lucifer was between your legs, his grip on your thighs, your arms around his neck, and you both looked at the door with the same stunned expression on your face.