Sounds like Tokyo Ghoule fanatt. It’s not a manga, there is also an artist who does the lost boys collection, it’s a bit emo goth meets steam punk. It’s been used for recruiting pages before and features other guys wearing gas masks, helmets, animal masks and one with a bucket too.
Can i ask if someone knows about a yaoi mangga that have a mask i think with a zipper on it i think he has a black hair too i just wanna ask ehe