User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-39089654-20191011010956/@comment-2208155-20191015103858

One arc has MANY VOLUMES inside it.. But yeah.. This will be his longest Arc..

This arc is called the Red Dragon Emperor of the Blazing Truth × White Dragon Emperor of the Morning Star: The True Dragon(s) of the Kuoh Academy