RE: Zero -Starting Life in Another World-, Chapter 3: Truth of Zero, Vol. 8 (Manga) - Tappei Nagatsuki

Fight The battle against the White Whale has concluded, but Subaru's fight is far from over. He knows the Witch Cultists have their eyes on Emilia, so he's brought forces-including Julius the knight, of all unlikely allies-to ambush them and crush their scheme. But when things go a little too smoothly against Subaru's nemesis, the Archbishop of Sin Petelgeuse, a suspicion lingers: Is there something vitally important they've failed to realize...?