Angels of Death Vol. 7 (manga)

Desc:

After finding a knife in Zack’s room and bringing it back to Floor B2, Ray searches for Zack, but he’s nowhere to be found. Gray is present, however, and he has words for the girl who’s charmed his angels. “The first link in this chain of misery…is you.” And with that, the deliberations end, Ray’s true character is revealed, and the witch trial begins!