Upper moon 6 of DxD (DxD harem x Daki reader)

(A/N: this was on the back burner for a while plus there isn't upper moon 6 story's plus it took forever to choose which one)

In a world we're god and satan are dead the three factions after decades of war are in a cease-fire do to there own low population. But tragedies and conflicts accurately one of them is the Nekomata massacre, but that day humans and a few stray devils who escaped cruel masters tried to help as much as they can but when the devil forces caught up to them they were attacked and all chopped up but the Nekomatas nore the others were found just a cloth belonging to a sash. This was called the sash massacre, years later a group called six moons appeared and have caused all the factions some minor trouble, there leaders are said to be siblings with known abilities and writing on there eyes but what will happen when there queen goes to Koah academy and have a run in with the devils there.