Princess- Obey me, one master to rule them all- Lucifer x Reader

How lucky you are! Yes, you, get to spend a year down in Devildom with 7 charming boys at your side. With seven demon lords standing tall with a deadly sin each assigned to them whatever could you do? With Lucifer, the eldest of the seven he is the closest to the next Demon King, Diavolo. Who has devised up a student...