Best described as a mashup of SAO and Gantz. Some incredibly stellar fight animation, like seriously stylish!
Which makes it all the more incredible that these fights can be made tedious by a main character that narrates every moment of fights in video-game terms. Nothing takes you out of the action like a character stopping to literally read character stats and skill names off a screen. But self-narration isn’t enough to encompass what a bad*** the protagonist is… We also need side characters too exist for the sole purpose of commenting on how strong and skilled the protagonist is. For such a gory anime, the stakes never feel real for our protagonist because he openly talks about his own plot armor as a “player”.
The music isn’t particularly memorable either. Come for the visuals, stay if you like (or can tolerate) watching anime emulate video games.