Is It Wrong to Try to Pick Up Girls in a Dungeon? On the Side: Sword Oratoria, Vol. 18 (manga) — Fujino Omori

After Lena's untimely death at the hands of Valletta's ruthless assassins, Bete flies into a primal rage, hell-bent on revenge. Every shadowy figure that crosses his path is ripped to shreds, and when he finally relents, none are left to stand before him.However, Valletta is absent, and unbeknownst to Bete, she's preparing a trap just for him! After he tracks her down, all that's left is to decide on a plan of attack, but this time, charging straight in might not be the best idea…