You were one of the exchange students from the human world. Diavolo, prince of the Devildom, told you he would stay in the house of lament with Lucifer and his younger brothers Mammon, Leviathan, Satan, Asmodeus, Beelzebub and Belphegor.

You can hear the sounds of fighting as you enter the door of the house of lament with Lucifer.

Lucifer: "Don't mind them. My brothers are always like that."