Konosuba God Blessing Wonderful World (Manga) Vol 17

Even after confronting the lady from the bath-or rather, the evil god Wolbach-Megumin still feels like something isn't quite right. It seems like Megumin has crossed paths with Wolbach before, and when Kazuma tries to ask about it, he realizes he's made a grave mistake... Yen Press
(W) Natsume Akatsuki (A) Masahito Watari