Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka IV: Shin Shou - Meikyuu-hen  

Is It Wrong to Try to Pick Up Girls in a Dungeon? IV, DanMachi 4th Season, Is It Wrong That I Want to Meet You in a Dungeon 4th Season, ダンジョンに出会いを求めるのは間違っているだろうかⅣ 新章 迷宮篇, Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka 4: Shin Shou - Meikyuu-hen, Is It Wrong to Try to Pick Up Girls in a Dungeon? 4, DanMachi 4

Bell Cranel has advanced in level, but he must not become complacent. The Hestia Familia still requires much progress before it can compete with other Orario Familias. However, prior to embarking on his next assignment, news of a gruesome murder emerges within the adventuring community. One of Bell's loyal companions is implicated in this heinous crime, and it falls upon him and his friends to exonerate their ally and expose an insidious plot that lurks beneath the surface of the dungeon's shadowy abysses.

The series adapts the volumes 12 and 13 of the light novel of Fujino Omori's series of the same title.