Author: Gabriel Persechino-Forest     Published: January 24th, 2018

https://www.youtube.com/watch?v=_XkOLkU8mk0

The anime’s opening song is performed by Aoi. Along with this teaser, two character visuals were also released:

Devil's Line Character Visual

The characters are Yuki Anzai and Tsukasa Taira.

 

Source: Anime News Network and Article Image: Taken from the teaser