Dark?

Library manga

Deception Detector
Dead Life
Date First, Love Later
Dark Mortal
Craftsman
Country of the Crimson Moon
Counter Cube
Competition For Revival
Code Adam
Cinderella Wasn’t Me
Castle Swimmer
Capture the Golem and Escape Poverty
Bug Train
Bug Player
Brass & Sass
Boyfriends.
Boyfriend of the Dead
Book Eater
Black Clover
Black Cat and Soldier
Beautiful Gunbari
Batman: Wayne Family Adventures
Barbarian Quest
Back to You
Baby Dragon
Ascension by slaying demons
Arma
Archmage Streamer
Arcane Sniper
Arachi: First Irregular