DanMachi also known as Is It Wrong to Try to Pick Up Girls in a Dungeon? is a Japanese light novel series written by Fujino Omori and illustrated by Suzuhito Yasuda. It follows the story of Bell Cranel, a young adventurer who becomes involved in a world of gods, monsters, and magic as he strives to become stronger and protect those he cares about. The series has been adapted into multiple anime and manga adaptations, as well as spin-off novels and video games.
The font chosen for the anime's English title is probably Romance Fatal Serif by Juan Casco's fantasy serif font. You can download the font for free in the Fonts Used Section and use it solely for personal purposes.